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折扣号考试12007-09-30 10:36:00

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Take Assessment - Voucher Exam - CCNA 4 WAN Technologies (Version 3.1)

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1
How is the number 225 represented in binary?
11001111
11011011
11110011
11100001

2
What transmission channels are provided by an ISDN BRI service?
23 64 kbps B channels and one 64 kbps D channel
30 64 kbps B channels and one 16 kbps D channel
two 56 kbps B channels and one 16 kbps D channel
two 64 kbps B channels and one 16 kbps D channel
two 64 kbps D channels and one 16 kbps B channel
23 64 kbps D channels and one 64 kbps B channel

3
Which of the following is true regarding latency?
CSMA/CD requires no latency.
It is also called asymmetry.
It is based entirely on distance.
Networking devices add to latency.

4
What is the length, in bits, of an Ethernet address?
12
24
32
48
80
128

5


The switches in the graphic are configured for VTP as shown. Select the statements that correctly describe the operation of these switches. (Choose two.)
A new VLAN can be added to Switch1 and that information will be added only to Switch2.
An existing VLAN can be deleted from Switch2 and that VLAN will be deleted from Switch1 and Switch4.
A new VLAN can be added to Switch4 and that information will be added to Switch1, Switch2, and Switch3.
A new VLAN can be added to Switch1 and that information will be added to Switch2 and Switch4.
A new VLAN can be added to Switch3 and that information will be added to Switch1, Switch2, and Switch4.
An existing VLAN can be deleted from Switch4 and that VLAN will be deleted from Switch1 and Switch2.

6
Which layer is responsible for organizing bits using framing?
Layer 1
Layer 2
Layer 3
Layer 4

7
What is the purpose of DLCIs in Frame Relay?
They determine the Frame Relay encapsulation type.
They identify the logical circuit between a local router and a Frame Relay WAN switch.
They represent the keepalives used to maintain the PVC in an active state.
They represent the physical address of the router attached to a Frame Relay network.

8
For which condition will the ARP protocol be used?
The destination IP address is unknown.
The destination MAC address is unknown.
The source IP address is unknown.
The source MAC address is unknown.

9


If the above network has been configured with RIPv2, how many usable host addresses are in the 192.168.10.192 subnet?
0
2
4
6
8

10
Which three of the following are uses of access control lists (ACLs)? (Choose three.)
protect hosts from viruses
classify network traffic
provide high network availability
identify interesting traffic for DDR
IP route filtering
monitor the number of bytes and packets

11
Which device allows data communication to occur between VLANs?
bridge
hub
switch
router

12
Which of the following EIGRP functions is the responsibility of the IP protocol-dependent module (PDM)? (Choose three.)
the calculation of successor and feasible successor routes for IP and IPX traffic
the notification of DUAL when IP routing information is received
the communication of information about IP routes with neighbor routers
the maintenance of the IP routing table
the exchange of hello packets with other IP-enabled routers
the insertion of lowest cost paths into the routing table

13
Which protocol is paired with its routing classification?
BGP-Interior
EIGRP-Exterior
OSPF-Exterior
RIP-Interior

14


Refer to the graphic. Which of the following are true regarding the route summary EIGRP would utilize for the networks on RouterA? (Choose two.)
The networks can be summarized with auto-summary.
The network summary must be manually configured.
The default subnet mask can be used to summarize the networks.
The networks can be summarized with 172.16.64.0/26.
The networks can be summarized with 172.16.64.0/27.
The networks can be summarized with 172.16.64.0/28.

15
Company XYZ has a Class B address of 135.166.0.0 and currently has 4 individual segments to subnet. The company will be adding 7 additional segments over this year and 9 additional segments the following year. What subnet mask should be used on the network in order to support the largest number of hosts per subnet?
255.255.224.0
255.255.240.0
255.255.248.0
255.255.250.0
255.255.252.0
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