Question 1.
Which two networking devices operate at Layer 1 of the OSI model? (Choose two.)

A. repeater
B. bridge
C. switch
D. router
E. hub

Answer:  A, E

Explanation: 

Question 2.
Which two networking devices forward data based on destination MAC address? (Choose two.)

A. repeater
B. bridge
C. switch
D. router
E. hub

Answer:  B, C

Explanation: 

Question 3.
Which two network topologies are the most popular in switching? (Choose two.)

A. bus
B. token passing bus
C. star
D. extended star
E. ring

Answer:  C, D

Explanation: 

Question 4.
Which device would you select to partition a network into VLANs?

A. repeater
B. bridge
C. switch
D. router
E. hub

Answer:  C

Explanation: 

Question 5.
At which layer of the OSI model does TCP operate?

A. 1
B. 2
C. 3
D. 4
E. 5

Answer:  D

Explanation: 

Question 6.
Which two layers of the OSI model relate to the transmission of bits over the wire and packet forwarding based on destination IP address? (Choose two.)

A. 1
B. 2
C. 3
D. 4
E. 5

Answer:  A, C

Explanation: 

Question 7.
Which layer of the OSI model is associated with the reliable transmission of datagrams?

A. datagram
B. routing
C. network
D. data link
E. transport
F. transmission
G. session

Answer:  E

Explanation: 

Question 8.
Which three terms are used to describe data at Layers 1, 2, and 4 of the OSI model? (Choose three.)

A. PDUs
B. bits
C. sequences
D. segments
E. packets
F. frames

Answer:  B, D, F

Explanation: 

Question 9.
Which two layers of the OSI model are combined in the Internet protocol suite application layer? (Choose two.)

A. 2
B. 3
C. 4
D. 5
E. 6
F. 7

Answer:  D, E

Explanation: 

Question 10.
Which two layers of the OSI model are combined in the Internet protocol suite network access layer? (Choose two.)

A. 1
B. 2
C. 3
D. 4
E. 5
F. 6
G. 7

Answer:  A, B

Explanation: 

Question 11.
In an IEEE 802.3 Ethernet frame, what is the significance of the DSAP field?

A. The DSAP field specifies the TCP or UDP port that is associated with the transport protocol.
B. The DSAP field is only used on United States Department of Defense networks to indicate the 
    information classification level.
C. The DSAP field is only used in Ethernet II frames.
D. The DSAP field indicates the network layer protocol.

Answer:  D

Explanation: 

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