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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Filed Under: CCNA - CISCO Certification

0 6918
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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0 6841
Q:

How many bits are in an IPv6 address field?

A) 24 B) 16
C) 32 D) 128
 
Answer & Explanation Answer: B) 16

Explanation:

There are 16 bits (four hex characters) in an IPv6 field.

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0 6813
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 6812
Q:

To enable OSPFv3, which of the following would you use?

A) Router1 (config - if) # ipv6 ospf 10 area 0.0.0.0 B) Router1 (config - if) # ipv6 router rip 1
C) Router1 (config - if) # ipv6 router eigrp 10 D) Router1 (config - if) # ospf ipv6 10 area 0
 
Answer & Explanation Answer: A) Router1 (config - if) # ipv6 ospf 10 area 0.0.0.0

Explanation:

To enable OSPFv3, you enable the protocol at the interface level as with RIPng. The command string is ipv6 ospf proces-id area area-id.

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0 6671
Q:

To use VLSM, what capability must the routing protocols in use possess?

A) Support for multicast B) Multi-protocol support
C) Transmission of subnet mask information D) Support for unequal load balancing
 
Answer & Explanation Answer: C) Transmission of subnet mask information

Explanation:

To use VLSM, the routing protocols in use possess the capability to transmit subnet mask information.

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0 6513
Q:

Your company wants to reconfigure a Catalyst 2950. Which actions must be taken to erase the old configuration?(Choose three)

A. Erase flash
B. Restart the switch
C. Delete the VLAN database
D. Erase the startup configuration

Answer

Answer: B  C  D

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2 6413
Q:

Which layer defines how data is formatted , presented, encoded, and converted for use on the network?

Answer

The presentation layer makes sure that data is in a readable format for the Application layer.

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11 6385