CompTIA Network+ Certification (N10-003) Part 19

1. The green light on a Network Interface Card (NIC) indicates that ______. (Choose the best answer)

Network connectivity is good

Transmission collisions are occurring

There is a problem with network connectivity

The network is down

The green light on a NIC is the link light and indicates that the NIC has a logical Data Link layer connection.

Explanation

The green light on a NIC is the link light and indicates that the NIC has a logical Data Link layer connection.

2. How can a user access a Web site when the DNS server is down?

By using Web server's MAC address

By using Web server's IP address

By using IPSec

By using SSL

DNS resolves host names to IP addresses. Thus, by using the IP address of the remote host, DNS will not be required.

Explanation

DNS resolves host names to IP addresses. Thus, by using the IP address of the remote host, DNS will not be required.

3. You have just been hired as a network technician and you notice that the amber light on a 100Base-T network interface card (NIC) flashes intermittently. What is the most probable cause of this problem?

The network interface card (NIC) is faulty

Transmission collisions are occurring between the network interface card (NIC) and the hub

The patch cable is faulty

The hub is faulty

The amber light, which is the collision light, indicates that an Ethernet collision has occurred. This light will flash continually because collisions are common on Ethernet networks.

Explanation

The amber light, which is the collision light, indicates that an Ethernet collision has occurred. This light will flash continually because collisions are common on Ethernet networks.

4. You work as a sales consultant. You need to check inventory data from a customer's premises. You log in to your network but you cannot access the database server that has the required information. You find that you cannot ping the database server by host name but can by IP address. What is the most probable cause of this problem?

The DHCP server is down

The print server is down

The DNS server is down

The remote access server is down

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

Explanation

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

5. You work as a network technician. Users complain about problems printing to a network printer attached to a print server named PRN01. You attempt to ping PRN01 by host name but fail. You succeed in pinging PRN01 by IP address. What is the most probable cause of this problem?

The DHCP server is down

The print server is down

The DNS server is down

The Proxy server is down

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

Explanation

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

6. You work as a senior network technician. A trainee asks you what might be wrong if you can not attach to a server using its host name but can still attach to it using the IP address. How do you answer?

The server has been moved to another subnet

The DHCP registration for the server that they are trying to connect to has expired

The server that they are trying to connect to has lost its registration in DNS (Domain Name Service)

WINS (Windows Internet Name Service) is enabled on the server

DNS is responsible for the translation of host names to IP addresses. In this scenario, the user cannot ping by host name but can ping by IP address. The problem thus lies with name resolution. It is possible that the server has lost its
registration in DNS.

Explanation

DNS is responsible for the translation of host names to IP addresses. In this scenario, the user cannot ping by host name but can ping by IP address. The problem thus lies with name resolution. It is possible that the server has lost its
registration in DNS.

7. You work as a network administrator. You installed a new DNS server on your network and removed the old one. Since the new DNS server has a different IP address, you updated your DHCP server to reflect this change. Which computers will be able to use the new DNS server?

Any computer that has not released and renewed their DHCP lease

Any computer that has released and renewed their DHCP lease

Any computer with a statically assigned IP address

Any computer on the network

Computers must release and renew their DHCP leases in order to receive the new configuration that has been updated on the DHCP server. Once they receive this new configuration, they will be able to access the new DNS server.

Explanation

Computers must release and renew their DHCP leases in order to receive the new configuration that has been updated on the DHCP server. Once they receive this new configuration, they will be able to access the new DNS server.

8. You work as a network administrator. You are experiencing problems accessing your file server via remote access. You receive a time out when you ping the file server name but you can ping the file server by IP address. What is the probable cause of this problem?

The DHCP server is down

The File server is down

The DNS server is down

The Remote Access server is down

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

Explanation

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

9. You work as a network technician and you have been asked to investigate a connectivity issue to your web site. You try to ping the web site by name but keep receiving a time out. You verify that the TCP/IP configuration on the local computer is correct and you can successfully ping the default gateway and the web server by using the IP address. Which of the following is the most probable cause of the problem?

The DNS server is down

The DHCP is down

The LAN is down

The router is down

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

Explanation

In this case you can ping the IP address but not the host name. Therefore there is a problem with host name to IP address resolution. DNS is responsible for host name to IP address resolution and is the most probable cause of the problem.

10. You are the network administrator for a network with 50 Windows 98 client workstations, 100 Windows 2000 Professional workstations and a server named SRV_001. SRV_001 is running Windows 2000 Server. You install a new file server named SRV_002 on the network. The users with Windows 98 workstations complain that they are not able to connect to SRV_002, but can connect to SRV_001. Users with Windows 2000 Professional workstations are not experiencing any problems. You are able to ping the IP address of SRV_002 from one of the Windows 98 workstations, but cannot connect by SRV_002's NetBIOS name. What is the most probable cause of this problem?

The DHCP server is down

The DNS server is down

The LMHOSTS files are outdated

The router is down

Windows 98 uses LMHOSTS files to resolve NetBIOS names to IP addresses. The LMHOSTS file is a static ASCII file that maps NetBIOS names to IP addresses. The NetBIOS name to IP address mapping of every host on the network must be entered manually on each workstation that relies on HOSTS files for NetBIOS name resolution. It appears that the NetBIOS name and IP address for SRV_002 has not been added to the LMHOSTS files. Windows 98 can also use WINS to resolve NetBIOS names to IP addresses.

Explanation

Windows 98 uses LMHOSTS files to resolve NetBIOS names to IP addresses. The LMHOSTS file is a static ASCII file that maps NetBIOS names to IP addresses. The NetBIOS name to IP address mapping of every host on the network must be entered manually on each workstation that relies on HOSTS files for NetBIOS name resolution. It appears that the NetBIOS name and IP address for SRV_002 has not been added to the LMHOSTS files. Windows 98 can also use WINS to resolve NetBIOS names to IP addresses.

11. You work as a network administrator. You have configured the Primary Domain Controller (PDC) and Backup Domain Controller (BDC) to handle DHCP requests from the network. Your network uses a range of 192.168.0.1 to 192.168.0.254 and a subnet of 255.255.255.0. Both the PDC and the BDC provides addresses within this range but DHCP errors are occurring. How would you resolve the problem?

Change the default subnet to 255.255.0.0 to increase the number of allowable IP (Internet Protocol) addresses to prevent collisions

The machines are holding IP (Internet Protocol) addresses in cache memory. Reboot to renew IP (Internet Protocol) address

In this scenario, we have two DHCP servers leasing the same IP address scope. This is the cause of the DHCP errors as both DHCP servers are trying to lease the same addresses. We can overcome these problems by removing one of the DHCP servers, or by splitting the IP address scope between the two.

Explanation

In this scenario, we have two DHCP servers leasing the same IP address scope. This is the cause of the DHCP errors as both DHCP servers are trying to lease the same addresses. We can overcome these problems by removing one of the DHCP servers, or by splitting the IP address scope between the two.

12. You work as a network administrator. You have installed an Ethernet NIC on a new computer and connected it to the network. The amber light on the NIC is flashing furiously. What is the problem?

Data transmission is taking place

Transmission collisions are occurring

The network cable is faulty

The network is down

The amber light, which is the collision light, indicates that an Ethernet collision has occurred. This light will flash continually because collisions are common on Ethernet networks.

Explanation

The amber light, which is the collision light, indicates that an Ethernet collision has occurred. This light will flash continually because collisions are common on Ethernet networks.

13. You are the network administrator and one morning a remote user complains that she could not log on to the network from home the previous evening. You run the arp -a command on the user's portable system and receive the output as shown in the following exhibit: Interface: 10.12.1.5 --- 0x2
Internet Address Physical Address Type
10.12.1.2 00-02-b3-a9-34-de dynamic
10.12.1.4 00-02-b3-d4-e8-c1 dynamic
10.12.1.5 00-02-b3-d0-a1-34 dynamic
10.12.1.5 00-02-b3-f2-e3-4d static Based on the output above, what is the most probable cause of the problem?

The DNS server is down

The DHCP server is down

The Remote Access server is down

There is an IP address conflict with another system

The arp utility is useful for resolving duplicate IP addresses. The arp -a command displays the local ARP table which lists the IP address to MAC address mappings. The output from the arp -a command indicates that two systems have the IP address 10.12.1.5.

Explanation

The arp utility is useful for resolving duplicate IP addresses. The arp -a command displays the local ARP table which lists the IP address to MAC address mappings. The output from the arp -a command indicates that two systems have the IP address 10.12.1.5.

14. The amber light on a Network Interface Card (NIC) indicates that ______. (Choose the best answer)

Network connectivity is good

Transmission collisions are occurring

There is a problem with network connectivity

The network is down

The amber light, which is the collision light, indicates that an Ethernet collision has occurred. This light will flash continually because collisions are common on Ethernet networks.

Explanation

The amber light, which is the collision light, indicates that an Ethernet collision has occurred. This light will flash continually because collisions are common on Ethernet networks.

15. You work as a network technician. A new NIC (Network Interface Card) has just been installed in a computer and it has been attached with a cable to a hub. What physical signs will the NIC show if it is functioning correctly and the network is up?

The amber light is flashing occasionally and the green light is lit steadily

The amber light is lit and steady and the green light is flashing continually

A NIC has two lights: a green light that indicates network connectivity, and is lit so long as there is network connectivity; and an amber light that flashes when collisions occurs. Collisions are common on an Ethernet network. Therefore the amber light will flash occasionally.

Explanation

A NIC has two lights: a green light that indicates network connectivity, and is lit so long as there is network connectivity; and an amber light that flashes when collisions occurs. Collisions are common on an Ethernet network. Therefore the amber light will flash occasionally.

16. You are a technician and you have been asked to troubleshoot a workstation that fails to connect to the network. Which LED on the NIC should you check first to identify the problem?

Link

Activity

Collision

Power

When troubleshooting a network problem you should check if there is a physical connection between the NIC and the hub or switch. The link LED on the NIC indicates that there is a connection to the network and should be the first thing you check.

Explanation

When troubleshooting a network problem you should check if there is a physical connection between the NIC and the hub or switch. The link LED on the NIC indicates that there is a connection to the network and should be the first thing you check.

17. You work as a network administrator. Three file servers on your network are configured to receive automatic IP configurations. A remote user calls to complain that she cannot access any of the file servers. You verify the IP configuration of the file servers. The file servers have IP address in the range 169.254.0.1 through 169.254.255.255. What is the most likely cause of this problem?

The DHCP server is down

The remote user doesn't have the required permissions

The DNS server is down

There are 10 concurrent connections to the file servers

DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network. However, the file server has been assigned an IP address in the APIPA range 169.254.0.1-169.254.255.255. These addresses are assigned to
DHCP clients that fail to contact a DHCP server. Thus there is a problem with the link to the DHCP server or the DHCP server itself.

Explanation

DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network. However, the file server has been assigned an IP address in the APIPA range 169.254.0.1-169.254.255.255. These addresses are assigned to
DHCP clients that fail to contact a DHCP server. Thus there is a problem with the link to the DHCP server or the DHCP server itself.

18. You are working as a network technician. A user calls and tells you that she is unable to reach a partner website. You are also unable to reach the web site but you can ping the host name and also establish a Telnet session using the host name. What is the most probable source of the problem?

The server does not have a DNS entry

The server HTTP is down

The server does not have a WINS entry

The server is down

Web browsers use HTTP to access web sites. If HTTP is down or port 80, which is used for HTTP traffic, is blocked, you won't be able to access the web site.

Explanation

Web browsers use HTTP to access web sites. If HTTP is down or port 80, which is used for HTTP traffic, is blocked, you won't be able to access the web site.

19. You are the network administrator for a company. One morning all users complain that they are unable to connect to one of your servers. You reboot the server but the problem persists. You cannot ping any of the workstations by host name or IP address. You also cannot ping the server's loopback address. What is the most probable cause of this problem?

The DNS server is down

The DHCP server is down

The network switch is down

The NIC on the server has failed

When the Network Interface Card (NIC) on host fails, it will not be able to ping its loopback address.

Explanation

When the Network Interface Card (NIC) on host fails, it will not be able to ping its loopback address.

20. You work as a network administrator. One of your users has requested and been granted full access rights to a folder share. The user reports that even though she can open and read the file in the folder share, she still cannot modify the file contents and save the file. What is the most likely cause of this problem?

The group rights filter has been changed through the GPO to disallow file access

The file registered has been pulled from cache memory and is not writeable

The file has been opened by another user and is open for read only

The file has been pulled from the backup source not the tree directory

This is the most likely answer.

Explanation

This is the most likely answer.

21. You are working as a network administrator. A user has complained about trouble with network connectivity from her workstation. She states that she cannot access any resources on the network. You try to ping different resources from the user's workstation but none of the echo requests reach the target using either host name or IP address. When you run the ipconfig command, you receive an IP address that is not in the correct subnet. What is the probable cause of this problem?

The DHCP (Dynamic Host Configuration Protocol) server has lost connection to the DNS (Domain Name Service)

Someone has enabled an additional DHCP (Dynamic Host Configuration Protocol) server

The WINS (Windows Internet Name Service) is offline

The DNS (Domain Name Service) is offline

It seems a rouge DHCP server was enabled on the network. The user's computer probably received its lease from the rouge DHCP server, which does not have the same address pool as the authorized DHCP server.

Explanation

It seems a rouge DHCP server was enabled on the network. The user's computer probably received its lease from the rouge DHCP server, which does not have the same address pool as the authorized DHCP server.

22. You work as a senior network administrator. A trainee asks you for some assistance. The trainee has changed the ISA (Industry Standard Architecture) Token Ring NIC (Network Interface Card) with a PCI (Peripheral Component Interconnect) Token Ring NIC in a users computer on a 16 Mbps (Megabits per second) LAN (Local Area Network). The user is now unable to connect to the network. There was no logon problems before the change of the NIC. What should you do next to resolve this problem?

Check the MAU (Multistation Access Unit)

Check the MAC address on the new NIC

Check the user password

Check that the new NIC works properly

When troubleshooting, you should check the condition that changed first, as this is the most likely cause of the problem. In this case we changed the NIC. Therefore, we should check the NIC to ensure that it is operating properly.

Explanation

When troubleshooting, you should check the condition that changed first, as this is the most likely cause of the problem. In this case we changed the NIC. Therefore, we should check the NIC to ensure that it is operating properly.

23. You work as an administrator on a network that has 125 Windows XP Professional client computers running Client Services for NetWare (CSNW) and 2 Novell Netware 5.0 servers. You install a new Novell NetWare 6.0 server on the network. Users complains that they cannot access the new NetWare 6.0 server but can access the two NetWare 5.0 servers. What is the most probable cause of the problem?

The Novell NetWare 6.0 server is not compatible with Novell NetWare 5.0

Novell NetWare 6.0 does not support Client Services for NetWare (CSNW)

The users do not have user accounts on the new Novell NetWare 6.0 server

The Novell NetWare 6.0 server does not support Client for Microsoft Networks

With Client Services for NetWare (CSNW), each user on a Windows workstation that needs to access NetWare server must a user account and rights on the NetWare server.

Explanation

With Client Services for NetWare (CSNW), each user on a Windows workstation that needs to access NetWare server must a user account and rights on the NetWare server.

24. You work as a network technician and one of the systems on your network is experiencing network connectivity problems. You replace the 100Base-T Network Interface Card (NIC) on the faulty system. However, both the green and the amber light on the new NIC are not lit. What is the most probable cause of the problem? (Choose the best answer)

The Network Interface Card (NIC) is faulty

The patch cable is faulty

The network switch is faulty

The network is down

You have replaced the Network Interface Card (NIC) but the problem persists. Assuming that the new NIC is in working order, the next component to check would be the patch cable.

Explanation

You have replaced the Network Interface Card (NIC) but the problem persists. Assuming that the new NIC is in working order, the next component to check would be the patch cable.

25. You are the network administrator for a company. You configure the network for DHCP. Which of the following would you configure on each workstation?

The DNS server address

The default gateway address

The DHCP server address

The workstation address

When a workstation is configured as a DHCP client, it receives its IP configuration from a DHCP server. The workstation would require the DHCP server's IP address to be able to contact the DHCP server.

Explanation

When a workstation is configured as a DHCP client, it receives its IP configuration from a DHCP server. The workstation would require the DHCP server's IP address to be able to contact the DHCP server.

26. You are working as a network administrator. All workstations on your network are configured as DHCP clients while all servers are configured with static IP addresses. A user complains that she cannot access any resources on the network. Other users are not experiencing this problem. You attempt to ping a file server from the user's computer. Pinging by both host name and IP address fails. The ipconfig command indicates an IP address of 169.254.32.10 and a subnet mask of 255.255.0.0. What is the probable cause of this problem?

The DHCP server is down

A rouge DHCP server is on the network

The user's workstation cannot connect to the DHCP server

The user's workstation is configured with a static IP address

169.254.32.10 is and APIPA address that is assigned to a DHCP client when that client cannot connect to DHCP server. In this case only the one user is having a problem therefore the other users must be able to access the DHCP server.

Explanation

169.254.32.10 is and APIPA address that is assigned to a DHCP client when that client cannot connect to DHCP server. In this case only the one user is having a problem therefore the other users must be able to access the DHCP server.

27. You are the network administrator for a company. One morning your CEO, who is out of town for a business meeting, calls to complain that he cannot dial in to the corporate RAS server. The modem on his portable system reports a no dial tone error. What is the most probable cause of the problem?

The DNS server is down

The DHCP server is down

The Remote Access server is down

The phone line the CEO is using is digital

The phone line the CEO is using is faulty

Modems require an analog phone line. Since there is no dial-tone, it is most likely that the phone line the CEO is trying to use is a digital line.

Explanation

Modems require an analog phone line. Since there is no dial-tone, it is most likely that the phone line the CEO is trying to use is a digital line.

28. You cannot reach a Web site on your intranet but you can ping the Web server by host name. What is the probable cause of the problem?

HTTP on the workstation is down

The DHCP server is down

The DNS server is down

Web Server is down

Web browsers use HTTP to access web sites. If HTTP is down or port 80, which is used for HTTP traffic, is blocked, you won't be able to access the intranet Web site.

Explanation

Web browsers use HTTP to access web sites. If HTTP is down or port 80, which is used for HTTP traffic, is blocked, you won't be able to access the intranet Web site.

29. You work as a network technician. Your company has a NetWare-based network. You are planning to add five new Windows 95 client systems to the network. You will install Novell NetWare Client to allow the new clients to connect to the NetWare server. What information will you need to configure the Novell NetWare Client on each system?

The user context and NDS tree name

The username and password

The domain name

All of the above

You need the preferred NDS tree name, the context, and the server properties to configure the Novell NetWare Client.

Explanation

You need the preferred NDS tree name, the context, and the server properties to configure the Novell NetWare Client.

30. You work as a network technician and one of the systems on your network is experiencing network connectivity problems. You notice that the green light on the system's 100Base-T Network Interface Card (NIC) flashes intermittently. Which of the following are the most likely causes of the problem?

The Network Interface Card (NIC)

The patch cable

The network switch

None of the above

The green light on the Network Interface Card (NIC) is the link light and indicates network connectivity. This light should be lit constantly. If this light is not lit constantly, it indicates a physical connectivity problem with either the NIC itself or the patch cable.

Explanation

The green light on the Network Interface Card (NIC) is the link light and indicates network connectivity. This light should be lit constantly. If this light is not lit constantly, it indicates a physical connectivity problem with either the NIC itself or the patch cable.

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