10.7 Troubleshooting Routers

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You manage a network with multiple subnets connected to the Internet.

A user reports that she can’t access the new server used in the accounting department. You check the problem and find out that her computer cannot access any server on the subnet, however the computer does access other computers on other subnets as well as the Internet.

Which of the following is most likely the cause of the problem?

Missing route on the default gateway router.

You are the network administrator of a branch office of your company. The branch office network is part of a WAN that covers most of the United States. The office has two Windows 2000 servers, two UNIX severs, one Windows NT server, 90 Windows 98 clients, 40 Windows 2000 Professional clients, and five Macintosh clients.

Users have been complaining that they are unable to access resources over the WAN at the main headquarters. You suspect that one of the routers between your office and the main headquarters is not working properly.

What TCP/IP utility can you use to see if a router is not working properly?


You are troubleshooting access to a server in a remote network. You use the tracert command and see the following:
Trace route to over a maximum of 30 hops:
1 2 ms 2 ms 2 ms
2 2 ms 2 ms 2ms
3 5 ms 5 ms 3 ms
4 2 ms 2 ms 2 ms
5 5 ms 5 ms 3 ms
6 2 ms 2 ms 2 ms
7 5 ms 5 ms 3 ms
…additional output omitted

What is the problem?

Routing loop.

Which of the following commands would display the output shown here?

route print.

You manage a network of multiple subnets connected to the Internet.

A user reports that she can’t access the Internet. You investigate the problem and find that she can access all hosts on the private network, but no hosts on the Internet.

Which of the following is likely the cause of the problem?

Missing default route on a router.

You have a remote access server to accept dial-up connections for remote access clients.
Remote clients are able to connect successfully and access resources on the remote access server. However, the remote clients are not able to connect to other devices located on the same subnet where the remote access server is located.

Which action would likely correct the problem?

Enable proxy arp on the LAN connection for the remote access server.

Examine the following output:
4 22 ms 21 ms 22 ms sttlawa01gr02.bb.ispxy.com []
5 39 ms 39 ms 65 ms plalca01gr00.bb.ispxy.com []
6 39 ms 39 ms 39 ms Rwest.placa01gr00.bb.ispxy.com []
7 40 ms 39 ms 46 ms svl-core-03.inet.ispoxy.net []
8 75 ms 117 ms 63 ms dia-core-01.inet.ispxy.net []

Which of the following produced this output?


You have just connected a new computer to your network. The network user static IP addressing.

You find that the computer can communicate with hosts on the same subnet, but not with hosts on a different subnet. No other computers are having a problem

Which of the configuration values would you most likely need to change?

Default gateway.

Which TCP/IP utility gives you the following output?
2 14 ms <10 ms 14 ms Loopback0.GWI.SLT1.ALTER.NET []
3 14 ms <10 ms 13 ms 122.at-6-0-0.XR1.SLT4.ALTER.NET []
4 <10 ms 14 ms <10 ms 0.so-0-1-0.TL1.SLT4.ALTER.NET []
5 41 ms 41 ms 41 ms 0.so-7-0-0.TL1.PQR3.ALTER.NET []
6 42 ms 41 ms 41 ms 0.so.6-0-0.XL1.SEA1.ALTER.NET []
7 41 ms 41 ms 41 ms PQS6-0.GW11.SEA1.ALTER.NET []


Which of the following utilities would you use to view the routing table?


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