发信人: songfongling(rrdn)
整理人: reynolds(2002-07-25 15:18:39), 站内信件
|
[ Q 34 ] You have two WINS servers on the network with a mix of Windows NT and Windows 98 clients. These servers are designated as primary and secondary WINS servers respectively. The clients get the IP configuration from a DHCP server hosted by a Windows 2000 server. Suddenly both of the servers go down. How will you ensure that the WINS clients continue to resolve NetBIOS names without generating any additional network traffic and without much administrative effort?
A. Specify node type as B-node in all clients.
B. Install WINS on a third server and add it in the DHCP server.
C. Enable WINS Proxy Agent on one of the clients.
D. Do nothing, let the clients use LMHOSTS file.
ANSWER:
B: Install WINS on a third server and add it in the DHCP server. One of the added features of Windows 2000 is that you can specify more than two WINS servers in the DHCP, so that if the clients fail to get response from either primary or the secondary server, the third WINS server springs into service for name resolutions. This allows for increases fault tolerance as you can specify up to 12 WINS servers.
A is incorrect because configuring each client with B-node type will be an additional administrative effort and will generate a lot of network traffic. C is incorrect because enabling WINS proxy will not help because the WINS Proxy Agent needs to be able to communicate with a WINS Server in order to resolve NetBIOS names. D is incorrect as it suggests a wrong solution to the problem.
[ Q 35 ] You are the network administrator of your office network that has eight branches. Each branch is connected directly to the head office with T1 links. All locations have WINS servers and you need to choose from a suitable WINS replication model for the WAN as the network clients are dependent on WINS for NetBIOS name resolutions. The network traffic is not a problem, because of the high-speed links and the convergence time must be kept as low as possible. Which of the following models best suit your requirements?
A. Spoke and Hub Replication Model
B. Ring Replication Model
C. Complete Trust Model
D. Push/Pull Replication Model
ANSWER:
A. For a network with 8 remote sites, the most efficient replication model is the Spoke and Hub model. In this model, one WINS Server would at each location would be configured as a site hub. Then, you would choose one of the site hub WINS Servers to be an intersite Hub. All the site hubs would replicate with the intersite hub. This is the most efficient method of replication in this scenario.
B is incorrect because for the Ring model to be used, you must have each site connected to two adjacent sites, in ring fashion. In this scenario, all sites are only connected to the central office and not to each other. C is incorrect because the Complete Trust Model refers to Windows NT 4.0 Domain Trusts, and not to WINS Replication models. D is also incorrect as Push/Pull replication is a method of WINS replication and not a replication model..
[ Q 36 ] You have three DNS servers. Each server hosts a single zone as follows:
ServerA: Standard Primary Zone
ServerB: Standard Secondary Zone
ServerC: Active Directory Integrated Zone
On which servers would you be able to make changes to the zone data?
A. ServerA, ServerB and ServerC
B. ServerC only
C. ServerA and ServerC
D. ServerB and ServerC
ANSWER:
C: Only standard Primary and Active Directory Integrated zones contain writable copies of the zone data.
A and D are incorrect because changes cannot be made on a server with a standard secondary zone (ServerB). A secondary zone contains read only records. B is incorrect because ServerA also hosts a zone in which changes can be made. A server hosting secondary zones gets updated by zone transfers from a master server, which might be the one hosting the primary zone or another secondary zone.
[ Q 37 ] You have just restored the WINS database on the secondary WINS server from the most current backup set that you had. You have verified that the restore is successful. What must you do immediately to put the WINS server back in service?
A. Restart the WINS server
B. Force replication from primary WINS server
C. Restart WINS service
D. Stop and restart the WINS service
ANSWER:
C: Restart the WINS service. In order to perform the restoration of the WINS database, you had to stop the WINS Server service. Because the service was stopped in order to perform the restore, you must restart the service.
A is incorrect because you need not restart the WINS server. B is incorrect because you need not force replication from the primary WINS server. The WINS Server service will begin replication when the service is restarted. D is an in appropriate choice as the WINS service is already stopped due to WINS database restore. It only needs to be restarted.
[ Q 38 ] A client queries a DNS server for resolution of a name. The client instructs the server to assume the workload for resolving the query and to query other DNS servers if necessary without involving the client. What type of name resolution is this?
A. A reverse lookup
B. An iterative query
C. A recursive query
D. A distributed query
ANSWER:
C: A recursive query is used where the DNS server assumes the responsibility for resolving a name. If the DNS cannot resolve the query it will contact other DNS servers until it obtains an answer or fails to resolve the request.
A is incorrect because a reverse lookup is a request to discover the name associated with an IP address. B is incorrect because an iterative query is where the client only gets the best answer from the DNS server. The answer may include the names of other DNS servers to contact. It is up to the client to contact the other DNS servers. D is incorrect because there is no such thing.
[ Q 39 ] Your network consists of ten subnets and all PCs on the network are using DHCP. You recently added two DNS servers to the network that you want all PCs to use. What would be the best way of configuring each PC with the addresses of the DNS servers?
A. Manually configure each PC with the Primary and Alternate DNS server addresses.
B. Configure the DHCP server with a scope option for the DNS server addresses.
C. Configure the DHCP server with a Server Option for the DNS server addresses.
D. Configure the DHCP server with a client option for the DNS server addresses.
ANSWER:
C: Because there are ten subnets then there is likely to be at least ten address scopes. It is required that every client has the same DNS addresses. To do this, a DHCP Server Option must be used. Server Options apply to all DHCP Scopes configured on an individual DHCP Server. Server Options were referred to as Global Options in Windows NT 4.0.
A is incorrect because the administrative effort to manually configure each client is cost prohibitive and would not make sense when you already have a DHCP Server solution in place. B is incorrect because it is inefficient. You could configure the DNS Server address in each of the scopes, but this solution entails more administrative effort than is required in this scenario. Any future changes would also have to be made to every scope giving rise to the possibility of a typing error. D is incorrect because client options only apply to machines with Client Reservations. It would be very tedious to specify the DNS server names for every computer configured with a reserved client address.
[ Q 40 ] You need to setup WINS on one of the Windows 2000 servers in your network to support desktops using older versions of Windows operating system. The server will be installed on a domain controller. Which of the following is a correct method to perform the installation?
A. Add a new WINS object in Active Directory Users and Computers console.
B. Run the WININSTALL.EXE from the command prompt.
C. Use the Add/Remove Programs, Windows Components from Control Panel.
D. Do nothing, WINS is installed by default on domain controllers.
ANSWER:
C: Use the Add/Remove Program, Windows Components from Control Panel. WINS service is installed on a Windows 2000 computer from the Windows Components of Control Panel. Select Network Services, click Details button, and select Windows Internet Name Service.
A is incorrect because you cannot install WINS service from the Active Directory Users and Computers Console. B is incorrect because the given command does not exist. D is incorrect because WINS is not installed by default, whether or not the Windows 2000 computer is a domain controller.
[ Q 41 ] Which of the following methods would you use to protect DNS records from unauthorized dynamic updates?
A. Configure the DNS server to use encrypted packets on the network.
B. Ensure that the zone database files are on an NTFS partition and use NTFS permissions to control access.
C. Configure the zone for secure dynamic updates.
D. Use a secure primary zone.
ANSWER:
C: A secure dynamic updates mode is available with Active Directory integrated zones only. In this mode it is possible to specify which users and groups are authorized to modify zone records.
A is incorrect because the use of encrypted packets does not provide any protection against the change of individual DNS records. B is incorrect because although the database files could be protected it does not give the granular control needed to control access to individual records within the zone. D is incorrect because there is no such thing.
[ Q 42 ] Which of the following is the correct zone file name for the reverse lookup zone for network id 165.154.0.0?
A. 154.165.in-addr.arpa.dns
B. 0.0.154.165.in-addr.arpa.dns
C. 165.154.in-addr.arpa.dns
D. 165.154.0.0.in-addr.arpa.dns
ANSWER:
A: Reverse lookup zones are used to determine the host name for a given IP address. The zone file names are formed by reversing the bytes that form the network id and appending the suffix in-addr.arpa.dns. For network ID 165.154.0.0, only the first two bytes signify the network address, the second two bytes are for host addresses.
B is incorrect because the 0.0 should not appear in the zone name. C is incorrect because the network address bytes have not been reversed. D is incorrect because the 0.0 should not appear in the zone name and the network address bytes have not been reversed.
[ Q 43 ] Which of the following commands would you use on a PC running Windows 2000 to release an IP address that was assigned by a DHCP server?
A. ipconfig /stop
B. ipconfig /release
C. net stop tcpipclient
D. net stop dhcpclient
ANSWER:
B: Ipconfig is used to manage the TCP/IP parameters for a PC. Ipconfig /release will cause the DHCP allocated address to be released. The PC will no longer have an IP address and further network communication will not be possible using the TCP/IP protocol.
A is incorrect because /stop is not a valid option to the ipconfig command. C and D are incorrect because the net stop command is used to stop a service and not for releasing IP addresses. Tcpipclient and dhcpclient are not valid services anyway.
[ Q 44 ] Which utility would you use to lookup the IP address of a host name?
A. dnscheck
B. ipconfig
C. nslookup
D. Network monitor
ANSWER:
C: nslookup is used to run name resolution queries. It can also be used to test that a DNS server is working as expected.
A is incorrect because there is no such utility. B is incorrect because ipconfig is used to check the TCP/IP settings on a computer. D is incorrect because Network Monitor is used to examine network traffic.
|
|