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Troubleshooting Network Connectivity Issues, Exams of Computer Science

United States International UniversityComputer Science

A series of practice questions related to troubleshooting network connectivity issues, such as problems with ip addressing, dhcp, dns, and network security. The questions cover a variety of scenarios that a network administrator might encounter, including a workstation unable to communicate with other hosts, a windows 8 computer unable to access network resources, an intranet site that can only be accessed by ip address, and issues with duplicate mac addresses and rogue dhcp servers. By analyzing these scenarios and the provided information, the reader can learn how to identify the most likely causes of the problems and the appropriate troubleshooting steps to resolve them. This document could be useful for network administrators, it professionals, and students studying network administration and troubleshooting.

Typology: Exams

2023/2024

Available from 09/21/2024

ROCKY-B
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BROADCOM 4.9.9 PRACTICE QUESTIONS
You manage a network that has multiple internal subnets. You connect a workstation to
the 192.168.1.0/24 subnet.
This workstation cannot communicate with any other host on the network. You
run.ipconfig /all.and see the following:
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix. : mydomain.local
Description . . . . . . . : Broadcom network adapter
Physical Address . . . . . : 00-AA-BB-CC-74-EF
DHCP Enabled. . . . . . . : NoAutoconfiguration Enabled . . : Yes
IPv4 Address. . . . . . . : 192.168.2.102(Preferred)
Subnet Mask . . . . . . . : 255.255.255.0Default Gateway. . . . . . : 192.168.1.1
DNS Servers . . . . . . . : 192.168.2.20
What is the MOST likely cause of the problem?
Incorrect IP address
You administer a network with Windows Server 2016, UNIX servers, and Windows 10
Professional, Windows 8, and Macintosh clients. A Windows 8 computer user calls you
one day and says that he is unable to access resources on the network. You
type.ipconfigon the user's computer and receive the following output:
0 Ethernet adapter:
IP address. . . . . . . . . : 169.254.1.17
Subnet Mask . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . :
You also check your NIC and see that the link light is on.
What might the problem be in this scenario?
An unavailable DHCP server
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BROADCOM 4.9.9 PRACTICE QUESTIONS

You manage a network that has multiple internal subnets. You connect a workstation to the 192.168.1.0/24 subnet. This workstation cannot communicate with any other host on the network. You run ipconfig /all and see the following: Ethernet adapter Local Area Connection: Connection-specific DNS Suffix. : mydomain.local Description....... : Broadcom network adapter Physical Address..... : 00-AA-BB-CC-74-EF DHCP Enabled....... : NoAutoconfiguration Enabled.. : Yes IPv4 Address....... : 192.168.2.102(Preferred) Subnet Mask....... : 255.255.255.0Default Gateway...... : 192.168.1. DNS Servers....... : 192.168.2. What is the MOST likely cause of the problem? Incorrect IP address You administer a network with Windows Server 2016, UNIX servers, and Windows 10 Professional, Windows 8, and Macintosh clients. A Windows 8 computer user calls you one day and says that he is unable to access resources on the network. You type ipconfig on the user's computer and receive the following output: 0 Ethernet adapter: IP address......... : 169.254.1. Subnet Mask........ : 255.255.0. Default Gateway...... : You also check your NIC and see that the link light is on. What might the problem be in this scenario? An unavailable DHCP server

You are a network technician for a small consulting firm. One of your users is complaining that they are unable to connect to the local intranet site. After some troubleshooting, you've determined that the intranet site can be connected to by using the IP address but not the hostname. Which of the following would be the MOST likely reason for this? Incorrect DNS settings Which two commands do you use to force a new IP configuration? ipconfig /renew ipconfig /release You are a network technician for a small consulting firm. One of your responsibilities is to manage the intranet site and configuration. You recently had to update the site's IP mapping due to a server upgrade. A user is having an issue with connecting to the intranet site now. When the user attempts to connect through their web browser, they receive a message that the page cannot be displayed. If you type in the IP address, the page loads fine. Which of the following commands should you use to fix this issue? ipconfig /flushdns You manage a network that has multiple internal subnets. You connect a workstation to the 192.168.1.0/24 subnet. This workstation can communicate with some hosts on the private network, but not with other hosts. You run ipconfig /all and see the following: Ethernet adapter Local Area Connection: Connection-specific DNS Suffix. : mydomain.local Description....... : Broadcom network adapter Physical Address...... : 00-AA-BB-CC-74-EF DHCP Enabled....... : No Autoconfiguration Enabled... : Yes IPv4 Address....... : 192.168.1.102(Preferred) Subnet Mask....... : 255.255.255.0Default Gateway......... : 192.168.2. DNS Servers........... : 192.168.2. What is the most likely cause of the problem? Incorrect default gateway

address assigned or incorrect IP configurations. Which of the following would be the MOST likely cause for this? Rogue DHCP server You are a network technician for a small consulting firm. Many users have reported issues with accessing the network. After some initial troubleshooting, you discover that devices are not receiving their IP configurations. You look into the issue and discover that the network is being targeted by a denial-of-service attack. Which of the following is your network MOST likely experiencing? DHCP starvation attack