Q:

How should a router that is being used in a Frame Relay  network be configured to keep split horizon issues from preventing routing updates

A) Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface B) Combine multiple Frame Relay circuits as a point-to-point line to support multicast and broadcast traffic
C) Configure many subinterfaces in the same subnet D) Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.
 
Answer & Explanation Answer: A) Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface

Explanation:

If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.

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2 7506
Q:

You want to ping the loopback address of your IPv6 local host. What will you type?

A) Ping 127.0.0.1 B) Ping 0.0.0.0
C) Ping ::1 D) trace 0.0. :: 1
 
Answer & Explanation Answer: C) Ping ::1

Explanation:

The loop back address with IPv4 is 127.0.0.1 . With IPv6, that address is ::1

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1 7438
Q:

What protocol would you use if you were running xDSL and needed authentication?

Answer

PPPoE  or  PPPoA

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4 7080
Q:

Which of the following descriptions about IPv6 is correct?

A) Addresses are not hierarchical and are assigned at random B) Broadcasts have been eliminated and replaced with multicasts
C) There are 2.7 billion addresses D) An interface can only be configured with one IPv6 address
 
Answer & Explanation Answer: B) Broadcasts have been eliminated and replaced with multicasts

Explanation:

There are no broadcasts with IPv6. Unicast , multicast, anycast, global, and link - local unicast are used.

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1 6980
Q:

Which layer of the OSI model offers three different modes of communication : Simplex, half duplex, and full duplex?

A) Presentation B) Transport
C) Application D) Session
 
Answer & Explanation Answer: D) Session

Explanation:

The Session layer of the OSI model offers three different modes of communication : Simplex, half duplex, and full duplex.

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1 6961
Q:

What is the subnetwork address for a host with the IP address 200.10.5.68/28?

A) 200.10.5.56 B) 200.10.5.32
C) 200.10.5.64 D) 200.10.5.0
 
Answer & Explanation Answer: C) 200.10.5.64

Explanation:

This is a pretty simple question. A/28 is 255.255.255.240, which means that our block size is 16 in the fourth octent. 0,16, 32, 48, 64, 80, etc. The host is in the 64 subnet.

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1 6880
Q:

A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

A) Send a different source port number B) Restart the virtual circuit
C) Decrease the sequence number D) Decrease the window size
 
Answer & Explanation Answer: D) Decrease the window size

Explanation:

A receiving host can control the transmitter by using flow control ( TCP uses windowing by default). By decreasing the window size, the receiving host can slow down the transmitting host so the receiving host does  not overflow its buffers.

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0 6851
Q:

The router address 192.168.10.250 is the default gateway for both the Web Server 2 and Host 1. What is the correct subnet mask for this network?

A. 255.255.255.0
B. 255.255.255.192
C. 255.255.255.250
D. 255.255.255.252

Answer

Answer : A

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0 6837