2025 Realistic Verified Free Cisco 100-150 Exam Questions

100-150 Real Exam Questions and Answers FREE

NEW QUESTION # 25
Which device protects the network by permitting or denying traffic based on IP address, port number, or application?

• A. VPN gateway
• B. Firewall
• C. Access point
• D. Intrusion detection system

Answer: B

Explanation:
Firewall: A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It permits or denies traffic based on IP addresses, port numbers, or applications.
Access Point: This is a device that allows wireless devices to connect to a wired network using Wi-Fi.
It does not perform traffic filtering based on IP, port, or application.
VPN Gateway: This device allows for secure connections between networks over the internet, but it is not primarily used for traffic filtering based on IP, port, or application.
Intrusion Detection System (IDS): This device monitors network traffic for suspicious activity and policy violations, but it does not actively permit or deny traffic.
Reference: Understanding Firewalls: Firewall Basics

NEW QUESTION # 26
Move the security options from the list on the left to its characteristic on the right. You may use each security option once, more than once, or not at all.
Note: You will receive partial credit for each correct answer.

Answer:

Explanation:

Explanation:
The correct matching of the security options to their characteristics is as follows:
* WPA2-Enterprise: Uses a RADIUS server for authentication
* WEP: Uses a minimum of 40 bits for encryption
* WPA2-Personal: Uses AES and a pre-shared key for authentication
Here's why each security option matches the characteristic:
* WPA2-Enterprise uses a RADIUS server for authentication, which provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.
* WEP (Wired Equivalent Privacy) is an outdated security protocol that uses a minimum of 40 bits for encryption (and up to 104 bits), which is relatively weak by today's standards.
* WPA2-Personal (Wi-Fi Protected Access 2 - Personal) uses the Advanced Encryption Standard (AES) for encryption and a pre-shared key (PSK) for authentication, which is shared among users to access the network.
These security options are essential for protecting wireless networks from unauthorized access and ensuring data privacy.

NEW QUESTION # 27
Which component of the AAA service security model provides identity verification?

• A. Authentication
• B. Accounting
• C. Auditing
• D. Authorization

Answer: A

Explanation:
The AAA service security model consists of three components:
Authentication, Authorization, and Accounting.
* Authentication: This is the process of verifying the identity of a user or device. It ensures that only legitimate users can access the network or service.
* Authorization: This determines what an authenticated user is allowed to do or access within the network.
* Auditing/Accounting: This component tracks the actions of the user, including what resources they access and what changes they make.
Thus, the correct answer is C. Authentication.
Reference: =
* Cisco AAA Overview
* Understanding AAA (Authentication, Authorization, and Accounting)

NEW QUESTION # 28
Move each cloud computing service model from the list on the left to the correct example on the right Note: You will receive partial credit for each correct answer.

Answer:

Explanation:

Explanation:
* Three virtual machines are connected by a virtual network in the cloud.
* Model: IaaS (Infrastructure as a Service)
* Explanation: IaaS provides virtualized computing resources over the internet, including virtual machines, storage, and networks.
* Users access a web-based graphics design application in the cloud for a monthly fee.
* Model: SaaS (Software as a Service)
* Explanation: SaaS delivers software applications over the internet, typically on a subscription basis, accessible via a web browser.
* A company develops applications using cloud-based resources and tools.
* Model: PaaS (Platform as a Service)
* Explanation: PaaS provides a platform allowing customers to develop, run, and manage applications without dealing with the infrastructure.
* IaaS (Infrastructure as a Service): Provides virtualized hardware resources that customers can use to build their own computing environments.
* PaaS (Platform as a Service): Offers a platform with tools and services to develop, test, and deploy applications.
* SaaS (Software as a Service): Delivers fully functional applications over the internet that users can access and use without managing the underlying infrastructure.
References:
* Cloud Service Models: Understanding IaaS, PaaS, SaaS
* NIST Definition of Cloud Computing: NIST Cloud Computing

NEW QUESTION # 29
Which two pieces of information should you include when you initially create a support ticket? (Choose 2.)

• A. The actions taken to resolve the fault
• B. Details about the computers connected to the network
• C. The description of the top-down fault-finding procedure
• D. A description of the conditions when the fault occurs
• E. A detailed description of the fault

Answer: D,E

Explanation:
Statement A: "A detailed description of the fault." This is essential for support staff to understand the nature of the problem and begin troubleshooting effectively.
Statement C: "A description of the conditions when the fault occurs." This helps in reproducing the issue and identifying patterns that might indicate the cause of the fault.
Statement B: "Details about the computers connected to the network." While useful, this is not as immediately critical as understanding the fault itself and the conditions under which it occurs.
Statement D: "The actions taken to resolve the fault." This is important but typically follows the initial report.
Statement E: "The description of the top-down fault-finding procedure." This is more of a troubleshooting methodology than information typically included in an initial support ticket.
Reference: Best Practices for Submitting Support Tickets: Support Ticket Guidelines

NEW QUESTION # 30
A user reports that a company website is not available. The help desk technician issues a tracert command to determine if the server hosting the website is reachable over the network.
The output of the command is shown as follows:

What can you tell from the command output?

• A. The server with the address 192.168.1.10 is reachable over the network.
• B. The server address 192.168.1.10 is being blocked by a firewall on the router at hop 3.
• C. Requests to the web server at 192.168.1.10 are being delayed and time out.
• D. The router at hop 3 is not forwarding packets to the IP address 192.168.1.10.

Answer: A

Explanation:
The tracert command output shows the path taken to reach the destination IP address, 192.168.1.10.
The command output indicates:
* Hops 1 and 2 are successfully reached.
* Hop 3 times out, meaning the router at hop 3 did not respond to the tracert request.
However, this does not necessarily indicate a problem with forwarding packets, as some routers may be configured to block or not respond to ICMP requests.
* Hops 4 and 5 are successfully reached, with hop 5 being the destination IP 192.168.1.10, indicating that the server is reachable.
Thus, the correct answer is C. The server with the address 192.168.1.10 is reachable over the network.
Reference: =
* Cisco Traceroute Command
* Understanding Traceroute
The tracert command output indicates that the server with the address 192.168.1.10 is reachable over the network. The asterisk (*) at hop 3 suggests that the probe sent to that hop did not return a response, which could be due to a variety of reasons such as a firewall blocking ICMP packets or the router at that hop being configured not to respond to ICMP requests. However, since the subsequent hops (4 and 5) are showing response times, it means that the packets are indeed getting through and the server is reachable12.
Reference: =
* How to Use Traceroute Command to Read Its Results
* How to Use the Tracert Command in Windows

NEW QUESTION # 31
HOTSPOT
An app on a user's computer is having problems downloading data.
The app uses the following URL to download data: https://www.companypro.net:7100/api
You need to use Wireshark to capture packets sent to and received from that URL.
Which Wireshark filter options would you use to filter the results? Complete the command by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct selection.

Answer:

Explanation:

Explanation:
To capture packets sent to and received from the URL https://www.companypro.net:7100/api using
Wireshark, you would use the following filter options:
Protocol: tcp
Filter Type: port
Port Number: 7100
This filter setup in Wireshark will display all TCP packets that are sent to or received from port 7100, which is the port specified in the URL for the API service. Since HTTPS typically uses TCP as the transport layer protocol, filtering by TCP and the specific port number will help isolate the relevant packets for troubleshooting the app's data download issues.
tcp: The app is using HTTPS, which relies on the TCP protocol for communication.
port: The specific port number used by the application, which in this case is 7100.
7100: This is the port specified in the URL (https://www.companypro.net:7100/api).
This filter will capture all TCP traffic on port 7100, allowing you to analyze the packets related to the application's data download.
Reference: Wireshark Filters: Wireshark Display Filters

NEW QUESTION # 32
Which address is included in the 192.168.200.0/24 network?

• A. 192.168.200.13
• B. 192.168.201.13
• C. 192.168.199.13
• D. 192.168.1.13

Answer: A

Explanation:
* 192.168.200.0/24 Network: This subnet includes all addresses from 192.168.200.0 to 192.168.200.255.
The /24 indicates a subnet mask of 255.255.255.0, which allows for 256 addresses.
* 192.168.199.13: This address is in the 192.168.199.0/24 subnet, not the 192.168.200.0/24 subnet.
* 192.168.200.13: This address is within the 192.168.200.0/24 subnet.
* 192.168.201.13: This address is in the 192.168.201.0/24 subnet, not the 192.168.200.0/24 subnet.
* 192.168.1.13: This address is in the 192.168.1.0/24 subnet, not the 192.168.200.0/24 subnet.
Reference: * Subnetting Guide: Subnetting Basics

NEW QUESTION # 33
An engineer configured a new VLAN named VLAN2 for the Data Center team. When the team tries to ping addresses outside VLAN2 from a computer in VLAN2, they are unable to reach them.
What should the engineer configure?

• A. Static route
• B. Default gateway
• C. Additional VLAN
• D. Default route

Answer: B

Explanation:
When devices within a VLAN are unable to reach addresses outside their VLAN, it typically indicates that they do not have a configured path to external networks. The engineer should configure a default gateway for VLAN2. The default gateway is the IP address of the router's interface that is connected to the VLAN, which will route traffic from the VLAN to other networks12.
References :=
*Understanding and Configuring VLAN Routing and Bridging on a Router Using the IRB Feature
*VLAN 2 not able to ping gateway - Cisco Community
*VLANs: Virtual Local Area Networks (VLANs) logically segment network traffic to improve security and performance. Devices within the same VLAN can communicate directly.
*Default Gateway: For devices in VLAN2 to communicate with devices outside their VLAN, they need a default gateway configured. The default gateway is typically a router or Layer 3 switch that routes traffic between different VLANs and subnets.
*Additional VLAN: Not needed in this scenario as the issue is related to routing traffic outside VLAN2, not creating another VLAN.
*Default Route: While a default route on the router may be necessary, the primary issue for devices within VLAN2 is to have a configured default gateway.
*Static Route: This is used on routers to manually specify routes to specific networks but does not address the need for a default gateway on the client devices.
References:
*Cisco VLAN Configuration Guide: Cisco VLAN Configuration
*Understanding and Configuring VLANs: VLANs Guide

NEW QUESTION # 34
DRAG DROP
Move each network type from the list on the left to the correct example on the right.

Answer:

Explanation:

Explanation:
Two home office computers are connected to a switch by Ethernet cables.
Network Type: LAN (Local Area Network)
A LAN connects devices within a limited area such as a home, office, or building, using Ethernet cables or Wi-Fi.
Three government buildings in the same city connect to a cable company over coaxial cables. Network Type: MAN (Metropolitan Area Network)
A MAN connects networks across a city or campus, often using fiber optic or coaxial cables.
A cell phone connects to a Bluetooth headset.
Network Type: PAN (Personal Area Network)
A PAN connects devices within a personal workspace, typically using wireless technologies like Bluetooth.
A financial institution connects its branches through a telecommunications service provider. Network Type: WAN (Wide Area Network)
A WAN connects multiple LANs over long distances, often using leased lines or satellite links provided by telecommunications companies.
LAN (Local Area Network): Used for connecting devices within a small geographical area such as a single building or home.
MAN (Metropolitan Area Network): Covers a larger geographical area than a LAN, typically a city or campus.
PAN (Personal Area Network): Connects devices within the range of an individual person, such as connecting a phone to a Bluetooth headset.
WAN (Wide Area Network): Spans large geographical areas, connecting multiple LANs across cities, countries, or continents.
Reference: Network Types Overview: Cisco Networking Basics
Understanding Different Network Types: Network Types Guide

NEW QUESTION # 35
What is the primary use of ICMP in network management?

• A. Translating domain names to IP addresses
• B. Assigning IP addresses
• C. Error reporting and diagnostics
• D. Secure file transfer

Answer: C

NEW QUESTION # 36
Computers in a small office are unable to access companypro.net. You run the ipconfig command on one of the computers. The results are shown in the exhibit.
You need to determine if you can reach the router.

Which command should you use? Complete the command by selecting the correct options from each drop- down lists.

Answer:

Explanation:

Explanation:
To determine if you can reach the router, you should use the ping command followed by the IP address of the router. The ping command is a network utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer.
The Default Gateway in the ipconfig results is typically the router's IP address in a home or small office network. In this case, the Default Gateway is 192.168.0.1, which is the address you would ping to check connectivity to the router.
References :=
* How to Use the Ping Command
* Testing Network Connectivity with the Ping Command
To determine if you can reach the router, you should use the ping command with the IP address of the router.
* Command: ping
* Target: 192.168.0.1
So, the completed command is:
* ping 192.168.0.1
Step by Step Comprehensive and Detailed Explanation:
* ping: The ping command sends ICMP Echo Request messages to the target IP address and waits for an Echo Reply. It is commonly used to test the reachability of a network device.
* 192.168.0.1: This is the IP address of the default gateway (the router) as shown in the ipconfig output.
Pinging this address will help determine if the computer can communicate with the router.
References:
* Using the ping Command: ping Command Guide

NEW QUESTION # 37
Which device protects the network by permitting or denying traffic based on IP address, port number, or application?

• A. VPN gateway
• B. Firewall
• C. Access point
• D. Intrusion detection system

Answer: B

Explanation:
* Firewall: A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It permits or denies traffic based on IP addresses, port numbers, or applications.
* Access Point: This is a device that allows wireless devices to connect to a wired network using Wi-Fi.
It does not perform traffic filtering based on IP, port, or application.
* VPN Gateway: This device allows for secure connections between networks over the internet, but it is not primarily used for traffic filtering based on IP, port, or application.
* Intrusion Detection System (IDS): This device monitors network traffic for suspicious activity and policy violations, but it does not actively permit or deny traffic.
References:
* Understanding Firewalls: Firewall Basics

NEW QUESTION # 38
HOTSPOT
For each statement about bandwidth and throughput, select True or False. Note: You will receive partial credit for each correct selection.

Answer:

Explanation:

Explanation:
Statement 1: Low bandwidth can increase network latency.
True: Low bandwidth can result in increased network latency because the network may become congested, leading to delays in data transmission.
Statement 2: High levels of network latency decrease network bandwidth.
False: High levels of network latency do not decrease the available network bandwidth, but they do affect the perceived performance and throughput of the network.
Statement 3: You can increase throughput by decreasing network latency.
True: Decreasing network latency can increase throughput because data can be transmitted more quickly and efficiently without delays.
Bandwidth vs. Latency: Bandwidth refers to the maximum rate at which data can be transferred over a network path. Latency is the time it takes for a data packet to travel from the source to the destination.
Low bandwidth can cause network congestion, which can increase latency as packets wait to be transmitted.
High latency does not reduce the actual bandwidth but can affect the overall performance and efficiency of data transmission.
Reducing latency can lead to higher throughput because the network can handle more data in a given period without delays.
Reference: Network Performance Metrics: Cisco Network Performance
Understanding Bandwidth and Latency: Bandwidth vs. Latency

NEW QUESTION # 39
DRAG DROP
Move each cloud computing service model from the list on the left to the correct example on the right. Note: You will receive partial credit for each correct answer.

Answer:

Explanation:

Explanation:
Three virtual machines are connected by a virtual network in the cloud.
Model: IaaS (Infrastructure as a Service)
IaaS provides virtualized computing resources over the internet, including virtual machines, storage, and networks.
Users access a web-based graphics design application in the cloud for a monthly fee.
Model: SaaS (Software as a Service)
SaaS delivers software applications over the internet, typically on a subscription basis, accessible via a web browser.
A company develops applications using cloud-based resources and tools. Model: PaaS (Platform as a Service)
PaaS provides a platform allowing customers to develop, run, and manage applications without dealing with the infrastructure.
IaaS (Infrastructure as a Service): Provides virtualized hardware resources that customers can use to build their own computing environments.
PaaS (Platform as a Service): Offers a platform with tools and services to develop, test, and deploy applications.
SaaS (Software as a Service): Delivers fully functional applications over the internet that users can access and use without managing the underlying infrastructure.
Reference: Cloud Service Models: Understanding IaaS, PaaS, SaaS
NIST Definition of Cloud Computing: NIST Cloud Computing

NEW QUESTION # 40
A local company requires two networks in two new buildings. The addresses used in these networks must be in the private network range.
Which two address ranges should the company use? (Choose 2.)
Note: You will receive partial credit for each correct selection.

• A. 172.16.0.0 to 172.31.255.255
• B. 192.16.0.0 to 192.16.255.255
• C. 11.0.0.0 to 11.255.255.255
• D. 192.168.0.0 to 192.168.255.255

Answer: A,D

Explanation:
The private IP address ranges that are set aside specifically for use within private networks and not routable on the internet are as follows:
* Class A: 10.0.0.0 to 10.255.255.255
* Class B: 172.16.0.0 to 172.31.255.255
* Class C: 192.168.0.0 to 192.168.255.255
These ranges are defined by the Internet Assigned Numbers Authority (IANA) and are used for local communications within a private network123.
Given the options: A. 172.16.0.0 to 172.31.255.255 falls within the Class B private range. B. 192.16.0.0 to
192.16.255.255 is not a recognized private IP range. C. 11.0.0.0 to 11.255.255.255 is not a recognized private IP range. D. 192.168.0.0 to 192.168.255.255 falls within the Class C private range.
Therefore, the correct selections that the company should use for their private networks are A and D.
References :=
* Reserved IP addresses on Wikipedia
* Private IP Addresses in Networking - GeeksforGeeks
* Understanding Private IP Ranges, Uses, Benefits, and Warnings

NEW QUESTION # 41
What is the purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch?

• A. To enable the switch to act as a default gateway for the attached devices
• B. To enable the switch to provide DHCP services to other switches in the network
• C. To enable the switch to resolve URLs for the attached the devices
• D. To enable access to the CLI on the switch through Telnet or SSH

Answer: D

Explanation:
The primary purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch is to facilitate remote management of the switch. By configuring an IP address on the management VLAN, network administrators can access the switch's Command Line Interface (CLI) remotely using protocols such as Telnet or Secure Shell (SSH). This allows for convenient configuration changes, monitoring, and troubleshooting without needing physical access to the switch1.
References :=
*Understanding the Management VLAN
*Cisco - VLAN Configuration Guide
*Remote Management of Switches
Assigning an IP address to the management VLAN interface (often the VLAN 1 interface by default) on a Layer 2 switch allows network administrators to remotely manage the switch using protocols such as Telnet or SSH. This IP address does not affect the switch's ability to route traffic between VLANs but provides a means to access and configure the switch through its Command Line Interface (CLI).
*A: The switch does not act as a default gateway; this is typically a function of a Layer 3 device like a router.
*B: The switch does not resolve URLs; this is typically a function of DNS servers.
*C: The switch can relay DHCP requests but does not typically provide DHCP services itself; this is usually done by a dedicated DHCP server or router.
Thus, the correct answer is D. To enable access to the CLI on the switch through Telnet or SSH.
References :=
*Cisco VLAN Management Overview
*Cisco Catalyst Switch Management

NEW QUESTION # 42
Which standard contains the specifications for Wi-Fi networks?

• A. GSM
• B. IEEE 802.11
• C. EIA/TIA 568A
• D. LTE
• E. IEEE 802.3

Answer: B

Explanation:
The IEEE 802.11 standard contains the specifications for Wi-Fi networks. It is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in various frequencies, including but not limited to 2.4 GHz, 5 GHz, and 6 GHz1.
This standard is maintained by the Institute of Electrical and Electronics Engineers (IEEE) and is commonly referred to as Wi-Fi. The standard has evolved over time to include several amendments that improve speed, range, and reliability of wireless networks.
References :=
*The Most Common Wi-Fi Standards and Types, Explained
*802.11 Standards Explained: 802.11ax, 802.11ac, 802.11b/g/n, 802.11a
*Wi-Fi Standards Explained - GeeksforGeeks

NEW QUESTION # 43
Which protocol allows you to securely upload files to another computer on the internet?

• A. NTP
• B. SFTP
• C. ICMP
• D. HTTP

Answer: B

Explanation:
SFTP, or Secure File Transfer Protocol, is a protocol that allows for secure file transfer capabilities between networked hosts. It is a secure extension of the File Transfer Protocol (FTP). SFTP encrypts both commands and data, preventing passwords and sensitive information from being transmitted openly over the network. It is typically used for secure file transfers over the internet and is built on the Secure Shell (SSH) protocol1.
References :=
*What Is SFTP? (Secure File Transfer Protocol)
*How to Use SFTP to Safely Transfer Files: A Step-by-Step Guide
*Secure File Transfers: Best Practices, Protocols And Tools
The Secure File Transfer Protocol (SFTP) is a secure version of the File Transfer Protocol (FTP) that uses SSH (Secure Shell) to encrypt all commands and data. This ensures that sensitive information, such as usernames, passwords, and files being transferred, are securely transmitted over the network.
*ICMP (Internet Control Message Protocol) is used for network diagnostics and is not designed for file transfer.
*NTP (Network Time Protocol) is used to synchronize clocks between computer systems and is not related to file transfer.
*HTTP (HyperText Transfer Protocol) is used for transmitting web pages over the internet and does not inherently provide secure file transfer capabilities.
Thus, the correct protocol that allows secure uploading of files to another computer on the internet is SFTP.
References :=
*Cisco Learning Network
*SFTP Overview (Cisco)

NEW QUESTION # 44
Which component of the AAA service security model provides identity verification?

• A. Authentication
• B. Accounting
• C. Auditing
• D. Authorization

Answer: A

Explanation:
The AAA service security model consists of three components: Authentication, Authorization, and Accounting.
*Authentication: This is the process of verifying the identity of a user or device. It ensures that only legitimate users can access the network or service.
*Authorization: This determines what an authenticated user is allowed to do or access within the network.
*Auditing/Accounting: This component tracks the actions of the user, including what resources they access and what changes they make.
Thus, the correct answer is C. Authentication.
References :=
*Cisco AAA Overview
*Understanding AAA (Authentication, Authorization, and Accounting)

NEW QUESTION # 45
In the network shown in the following graphic, Switch1 is a Layer 2 switch.

PC-A sends a frame to PC-C. Switch1 does not have a mapping entry for the MAC address of PC-C.
Which action does Switch1 take?

• A. Switch1 floods the frame out all active ports except port G0/1.
• B. Switch1 sends an ARP request to obtain the MAC address of PC-
• C. Switch1 queries Switch2 for the MAC address of PC-C.
• D. Switch1 drops the frame and sends an error message back to PC-

Answer: D

Explanation:
In a network, when a Layer 2 switch (like Switch1) receives a frame destined for a MAC address that is not in its MAC address table, it performs a flooding operation. This means the switch will send the frame out of all ports except the port on which the frame was received. This flooding ensures that if the destination device is connected to one of the other ports, it will receive the frame and respond, allowing the switch to learn its MAC address.
A). Switch1 queries Switch2 for the MAC address of PC-C: This does not happen in Layer 2 switches; they do not query other switches for MAC addresses.
A). Switch1 drops the frame and sends an error message back to PC-A: This is not the default behavior for unknown unicast frames.
D). Switch1 sends an ARP request to obtain the MAC address of PC-C: ARP is used by devices to map IP addresses to MAC addresses, not by switches to find unknown MAC addresses.
Thus, the correct answer is
B). Switch1 floods the frame out all active ports except port G0/1.
Reference: =
Cisco Layer 2 Switching Overview
Switching Mechanisms (Cisco)

NEW QUESTION # 46
DRAG DROP
Move the security options from the list on the left to its characteristic on the right. You may use each security option once, more than once, or not at all. Note: You will receive partial credit for each correct answer.

Answer:

Explanation:

Explanation:
The correct matching of the security options to their characteristics is as follows:
WPA2-Enterprise: Uses a RADIUS server for authentication
WEP: Uses a minimum of 40 bits for encryption
WPA2-Personal: Uses AES and a pre-shared key for authentication
Here's why each security option matches the characteristic:
WPA2-Enterprise uses a RADIUS server for authentication, which provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.
WEP (Wired Equivalent Privacy) is an outdated security protocol that uses a minimum of 40 bits for encryption (and up to 104 bits), which is relatively weak by today's standards.
WPA2-Personal (Wi-Fi Protected Access 2 - Personal) uses the Advanced Encryption Standard (AES) for encryption and a pre-shared key (PSK) for authentication, which is shared among users to access the network.
These security options are essential for protecting wireless networks from unauthorized access and ensuring data privacy.

NEW QUESTION # 47
Examine the following output:

Which two conclusions can you make from the output of the tracert command? Note: You will receive partial credit for each correct answer. (Choose 2.)

• A. The trace successfully reached the www.cisco.com server.
• B. The trace failed after the fourth hop.
• C. The device sending the trace has IPv6 address 2600:1408:c400:38d :: b33.
• D. The IPv6 address associated with the www.cisco.com server is 2600:1408: c400: 38d: : b33.
• E. The routers at hops 5 and 6 are offline.

Answer: A,D

Explanation:
* Statement A: "The trace successfully reached the www.cisco.com server." This is true as indicated by the "Trace complete" message at the end, showing that the trace has reached its destination.
* Statement C: "The IPv6 address associated with the www.cisco.com server is
2600:1408:c400:38d::b33." This is true because the final hop in the trace, which is the destination, has this IPv6 address.
* Statement B: "The trace failed after the fourth hop." This is incorrect as the trace continues beyond the fourth hop, despite some intermediate timeouts.
* Statement D: "The routers at hops 5 and 6 are offline." This is not necessarily true. The routers might be configured to not respond to traceroute requests.
* Statement E: "The device sending the trace has IPv6 address 2600:1408:c400:38d::b33." This is incorrect; this address belongs to the destination server, not the sender.
Reference: * Understanding Traceroute: Traceroute Guide

NEW QUESTION # 48
Which information is included in the header of a UDP segment?

• A. Sequence numbers
• B. MAC addresses
• C. Port numbers
• D. IP addresses

Answer: C

Explanation:
The header of a UDP (User Datagram Protocol) segment includes port numbers. Specifically, it contains the source port number and the destination port number, which are used to identify the sending and receiving applications. UDP headers do not include IP addresses or MAC addresses, as those are part of the IP and Ethernet frame headers, respectively. Additionally, UDP does not use sequence numbers, which are a feature of TCP (Transmission Control Protocol) for ensuring reliable delivery of data segments1.
References :=
* Segmentation Explained with TCP and UDP Header
* User Datagram Protocol (UDP) - GeeksforGeeks
* Which three fields are used in a UDP segment header
* UDP Header: The header of a UDP segment includes the following key fields:
* Source Port: The port number of the sending application.
* Destination Port: The port number of the receiving application.
* Length: The length of the UDP header and data.
* Checksum: Used for error-checking the header and data.
* IP Addresses: These are included in the IP header, not the UDP header.
* Sequence Numbers: These are part of the TCP header, not UDP.
* MAC Addresses: These are part of the Ethernet frame header and are not included in the UDP header.
References:
* RFC 768 - User Datagram Protocol: RFC 768
* Cisco Guide on UDP: Cisco UDP Guide

NEW QUESTION # 49
You purchase a new Cisco switch, turn it on, and connect to its console port. You then run the following command:

For each statement about the output, select True or False.
Note: You will receive partial credit for each correct selection.

Answer:

Explanation:

Explanation:
* The two interfaces are administratively shut down:
* False: The output does not show any "shutdown" command under the interfaces, which would indicate that they are administratively shut down. Therefore, they are likely in their default state, which is administratively up.
* The two interfaces have default IP addresses assigned:
* False: The output does not show any IP address configuration. In the default state, interfaces do not have IP addresses assigned unless explicitly configured.
* The two interfaces can communicate over Layer 2:
* True: By default, interfaces on a switch are Layer 2 interfaces capable of forwarding Ethernet frames. As there is no configuration provided that changes this, it can be assumed they can communicate over Layer 2.
* Interface Status: The absence of the "shutdown" command means the interfaces are not administratively shut down.
* IP Address Assignment: There is no evidence in the output that IP addresses have been assigned to the interfaces, which would typically be shown as "ip address" entries.
* Layer 2 Communication: Switch interfaces in their default state operate at Layer 2, enabling them to forward Ethernet frames and participate in Layer 2 communication.
References:
* Cisco IOS Interface Configuration: Cisco Interface Configuration
* Understanding Cisco Switch Interfaces: Cisco Switch Interfaces

NEW QUESTION # 50
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