Question 1.
What is the primary benefit of the "time- to-live" field in the IP header?

A. To improve buffer utilization
B. To reduce the impact of routing loops
C. To allow calculation ofrounD. trip delays
D. To remind us that all earthly joys are fleeting
E. To avoid delivery of packets that are no longer useful

Answer: B

Question 2.
A router interface address is 180.60.45.96 with a mask of 255.255.255.224. 

What configuration statement

A. routerospf 1 network 180.60.45.96 255.255.255.32 area 0
B. routerospf 1 network 180.60.45.96 0.255.255.224 area 0
C. router ospf 1 network 180.60.45.96 0.0.0.31 area 0
D. routerospf 1 network 180.60.45.96 0.0.0.224 area 0

Answer: C

Question 3.
An IGX-8 identifies itself as an IGX-32 on the configuration screen. What has gone wrong?

A. The NPM was originally in an IGX-32.
B. Database corruption has occurred.
C. The user must physically set a jumper on the SCM to correct this.
D. Use thesetnovram command to change the switch type.

Answer: C

Question 4.
In PNNI networks, AESA has the following general format:

A. 12-byte network prefix plus a 7-byte End System Identifier plus 1 byte Selector
B. 11-byte network prefix plus an 8-byte End System Identifier plus 1 byte Selector
C. 7-byte network prefix plus a 12-byte End System Identifier plus 1 byte Selector.
D. 13-byte network prefix, a 6-byte End System Identifier plus 1 byte Selector

Answer: D

Question 5.
To eliminate the need for adjacent routers on broadcast networks to form n(n-1)/2 adjacencies, ISIS defines a pseudonode or Designated Intermediate System, DIS. All router on the broadcast medium form an adjacency with the DIS. The Backup DIS is called:

A. Redundant DIS
B. BDR
C. There is no concept of a backup DIS in IS-IS
D. Designated Redundant System

Answer: C

Question 6.
Cisco/StrataCom (Gang of four) LMI uses what DLCI for messages?

A. 0
B. 1023
C. It should be configurable, as per the specification.
D. It is negotiated when the ports become active.

Answer: B

Question 7.
Click the Exhibit button to view the topology. Using the above diagram, which are valid BGP AS_Path Attributes received at Net1 for a route originating from AS65100? (multiple answer)
 
A. 200 57000 100 65100
B. 200 57000 100100
C. 100 57000 200
D. 200 57000 100
E. 65100 100 57000 200

Answer: A, D, E

Question 8.
The default network clocking source in a BPX network is:

A. The internal oscillator of the lowest-numbered node
B. The internal oscillator of the highest-numbered node
C. Each node's own internal oscillator
D. The clock chip on the network management system

Answer: B

Question 9.
When using IS-IS for IP routing, Dual IS-IS defined by RFC 1195, what is true? (multiple answer)

A. It is necessary to configure a NSAP address.
B. it is not possible to perform both IP and CLNS routingwih the same process.
C. IP address and subnet information is carried in the TLVfield on the L-1/L-1 LSPs.
D. Dual IS-IS does not support VLSM information.

Answer: A, C

Question 10.
What is true about the DLCI field in the Frame Relay header?

A. It consists of two portions, source and destination, which map data to a logical channel.
B. It generally has significance only between the local switch and the DTE device.
C. It is an optional field in the ITU-T specification.
D. It is present only in data frames sent through the network.

Answer: B

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