7. Your are the Network Administrator for a company that has a routed network with 2 Windows 2000 Server, 100 Windows 2000 Professional, and 25 Windows 98 computers. TCP/IP is the only network protocol installed and DHCP is used to assign IP Address to the computers. One of the Windows 98 computer users complain that he can access to some of the network resources such files or printers using computer name but not all, you check several PCs and found that all Windows 98 Computer cannot locate network resources using computer name but All Windows 2000 computers can locate network resources without any problems. After that, you open the TCP/IP Properties menu to compare the setting for both Windows 2000 computer and Windows 98 computer, however, all their setting are the same, both of them have the same DNS server, default gateway, etc. What should you do to resolve the problem?

A. Install WINS Server in one of the Windows 2000 Server and use DHCP scope option to set the WINS Server for client computers and also set the client to use b-node for NETBIOS name resolution.
B. Install WINS Server in one of the Windows 2000 Server and use DHCP scope option to set the WINS Server for client computers and also set the client to use H-node for NETBIOS name resolution.
C. Create a Lmhosts file and add the entry for all the resources in the other subnet to the file, distribute the file to Windows 98 computers using logon script.
D. Create a hosts file and add the entry for all the resources in the other subnet to the file, distribute the file to Windows 98 computers using logon script.
E. Install a WINS Proxy Agent on both of the subnet use DHCP scope option to set the WINS Proxy Agent for client computers and also set the client to use b-node for NETBIOS name resolution.
F. Install a WINS Proxy Agent on both of the subnet use DHCP scope option to set the WINS Proxy Agent for client computers and also set the client to use H-node for NETBIOS name resolution.

Windows 2000 computers use DNS for name resolution, but Pre-Windows 2000 Windows Operating systems such as Windows NT 4.0 ro Windows 95 resolves name using WINS. As such, for this case, the Windows 2000 computer able to access to the resources but the Windows 98 cannot without the present of WINS. To solve the problem, WINS server must be installed, and the client must be configured to use that WINS server. The node type specify how a NETBIOS name resolution should be handle by the client, B-node means client should use broadcast, H-node means client should use WINS server to resolve name and if not sucess then use broadcast. For this case, we want to use WINS server, hence H-node should be used.
Other nodes such as P-node and M-node are seldom used, P-node specify that the client should contact the Name resolution server directly and will not use broadcast, M-node specify that Broadcast should be used first before Name resolution server which is exactly the opposite of H-node. WINS proxy agent is only used when a non-WINS client need to resolve name that is not in the same subnet with the client computer, the WINS Proxy agent will listen to the broadcast message and then resolve the name for the non-WINS client by contacting the WINS server.

Answer: B

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24. You are the network administrator for a company called PC Support Ltd. The network for PC Support Ltd. Contains 200 Windows 2000 Professional computers and 10 Windows 2000 Servers. There is one forest setup with three domains named cisco.pcsupport.com, novell.pcsupport.com, and ibm.pcsupport.com. A Standard DNS zone is setup for novell.pcsupport.com to provide name resolution to Windows 2000 client computers in one of the Windows 2000 Servers and another DNS server is setup as secondary zone for novell.pcsupport.com. Users report that they can access to a web server named MCSASVR using its IP address but not using its hostname. While you ping MCSASVR host name, you found that the IP address returned by the ping command is not the IP address for MCSASVR. You want to ensure that users can access to MCSASVR using its host name, and prevent the same problem occurs again in future, how can you accomplish this task?(Choose two)

A. Change the zone type to Active Directory integrated for the novell.pcsupport.com zone.
B. Allow only secure update for the novell.pcsupport.com zone.
C. Run the ipconfig/release command on the computer that responds to the ping. Run the ipconfig/renew command on MCSASVR.
D. Disable dynamic updates for the novell.pcsupport.com
E. Delete the current DNS entry for MCSASVR. Run the ipconfig/registerdns command on MCSASVR
F. Disallow zone transfers for the novell.pcsupport.com zone.

From Microsoft Documentation:

====================================================================================
If you are not using Active Directory, be aware of the points of failure and configuration issues that apply to using dynamic updates with standard primary type zones.
Standard primary type zones are required to create and manage zones in your DNS namespace if you are not using Active Directory. In this case, a single-master update model applies, with one DNS server designated as the primary server for a zone. Only the primary server, as determined in the SOA record properties for the zone, can process an update to the zone.

For this reason, be certain that clients are configured to use a preferred DNS server that is reliable and available to process and refer updates. Otherwise, clients are not able to successfully update their host (A) or pointer (PTR) resource records (RRs).

====================================================================================

The possible reason that the above problem may arise is while the MCSASVR server was trying to obtain a new IP address from DHCP server, the attempt to update the DNS server failed due to the reason that the DNS may not be available at that moment. As such, the old MCSASVR host A record that point to another IP address is continue to be used by DNS server. To solve this problem, you need to delete the DNS entry for MCSASVR in the DNS server and then register the Host again using the ipconfig/registerdns . The new host A record with correct IP address will then be registered in the DNS server. The use of Standard primary zone together with a Secondary Zone to provide DNS Name resolution fault tolerance is rational as both of the server are able to resolve the name resolution, however, there is no any fault tolerance for Dynamic name registration process for that setup since only the primary zone will allow the update of its zone records. This means that when the primary server is not available, name registeration will failed and the above problem may occurs again. Thus to avoid the same problem, both of the DNS server should be upgraded to Active Directory Integrated zone which allow Multi-master update. It is not necessary to release the IP address of the computer that reply to the ping as its IP address is not conflicting with other host. The MCSASVR does not need to renew its IP address as well as its IP address does not cause any conflict with others, the only problem is the DNS entry which should be deleted.

Answer: A and E

References:
http://www.microsoft.com/windows2000/en/server/help/sag_dns_imp_bestpractices.htm

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32. Your company has a network as shown in the above diagram. All the Router are setup using a Windows 2000 Server. Users from Cardiff complain that they cannot access to hosts at Oxford that using network ID 192.168.2. You use tracert to trace a host in Oxford and you found that request timeout at routing interface using 192.168.2.2, however when you ping that router interface using a host in Oxford, positive reply received. You verify the Windows 2000 servers and found that static route is not added and dynamic routing protocols are not installed. You have decided to use static route to solve the problem, which of the following must you perform to solve the problem for routing between Cardiff and Oxford?(Choose two)

A. On Cardiff router, run the following command: route add 192.168.2.0 mask 255.255.255.0 192.168.1.2 -p
B. On Oxford router, run the following command: route add 192.168.0.0 mask 255.255.255.0 192.168.1.1 -p
C. On Cardiff router, run the following command: route add 192.168.2.0 mask 255.255.255.0 192.168.2.2 -p
D. On Oxford router, run the following command: route add 192.168.0.0 mask 255.255.255.0 192.168.0.1 -p

When using static route, you should use the -p parameter so that the route will be persistent
For the above case, you should add two static routes to solve the problem, one is to inform the router at Cardiff any packet that has the destination network of 192.168.2.0 should be sent to the routing interface 192.168.1.2 at Oxford, and the other is to inform the router at Oxford that any packet that has the destination network of 192.168.0.0 should be sent to the routing interface 192.168.1.1 at Cardiff. Note that you should not add the route to another network using the gateway that the router is not connected to it directly, such as using 192.168.2.2 as gateway for Cardiff router which has no direct connection to 192.168.2.2, hence C and D are incorrect.

Answer: A and B

References:
http://www.microsoft.com/windows2000/en/server/help/sag_tcpip_pro_addstaticroute.htm

 

 

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