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CCIE试题-1(1) |
| 来源:www.stu88.com 时间:2006-04-01 |
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The following are similar to some of the questions on the CCIE written which I failed by about 8%. Please forward your answers and explanations.
Multiple answers are possible.
1. What is not a basic function of a bridge?
a. Multiple network interconnection.
b. Broadcast suppression.
c. Protocol independent routing.
d. Network extension.
e. Packet forwarding.
2. What is the purpose of a spanning tree algorithm?
a. Selects the best path between LANs for redundancy.
b. Only used by DEC bridges to dynamically configure a routing table.
c. Reduces the number of broadcasts necessary by forwarding a specific subset.
d. Used by bridges to dynamically discover a loop-free topology that includes a path to every set of LANs.
e. Defined by IEEE 802.1d to enforce a hybrid star/bus network topology.
3. A "routed" protocol has the following characteristics:
a. Conforms exactly to the OSI Reference Model.
b. Uses a metric to calculate the best path.
c. Embeds an identifier in each packet which uniquely specifies a logical grouping of hosts.
d. Ensures a loop-free topology.
e. All of the above.
A and B have been replaced with bridges to isolate the traffic on the ethernet links.
Host1-------RouterA ----------------Router B--------Host2
4. What addressing changes need to made to Host 1 and Host 2?
a. Change the network address on Host 1 and Host 2?
b. Change the host addresses on both Host 1 and Host 2.
c. Change the MAC address on Bridge A.
d. Change the host address, serial connection will use another network number and Host 2 will use a third network number.
e. None. Since they are all connected, no network numbers are necessary.
5,. Which is not a valid bridge number in a route designator?
a. 0x3
b. 0x7
c. 0xb
d. 0xf
e. 0x11
6.. Which is not a true statement about the User Datagram Protocol (UDP)?
a. UDP can be used in place of TCP as a transport protocol.
b. UDP is a connection-less protocol.
c. UDP packets use error checking to provide high reliability.
d. UDP uses IP to transport messages.
e. UDP uses port numbers to distinguish between multiple destinations on a given
host computer.
7. Occasionally the "show interface" display for token ring will show 0000.0000.0000 (all zeros) as the BIA interface MAC or hardware address. What does this usually mean?
a. IP has not been configured yet.
b. Interface is acting as the Active Monitor.
c. Software error
d. The ring is beaconing
e. Interface has never successfully inserted into the ring
8. According to information on a interface it can do Source Route Transparent bridging. This means:
a. Token ring using SNAP encapsulation to Token ring using 802.3 encapsulation conversion.
b. Routing Information Fields (RIF) will be added or removed as necessary when going between the different types of media.
c. This interface can only forward traffic to ethernet segments.
d. Will source-route transparently bridge token ring frames to FDDI.
e. Packets received on this interface without a Routing Information Field (RIF) will be transparently bridged.
9.. When a packet is blocked because it fails to match a filter or access list, what type of ICMP message is sent to the destination?
a. Destination Unreachable
b. Access Denied
c. Source Quench
d. Time Exceeded
e. None
10.. Which is the true statement about Link State routing protocols?
a. Link state routing uses the Bellman-Ford algorithm.
b. Each router is responsible for learning about its neighbors and their links and flooding this information to all of the other routers in the network.
c. All routers using a Link State protocol will have the same topology map of the network.
d. Best routes are determined dynamically starting with the lowest MAC address. 共3页: 1 [2] [3] 
下一篇：Cisco Certified Network Associate(PDF)
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