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QUESTION NO:5

At which layer of the OSI model does TCP operate?

A. 1

B. 2

C. 3

D. 4

E. 5

Answer: D Explanation:

http://en.wikipedia.org/wiki/OSI_model

QUESTION NO:13

What are two features of a bridge? (Choose two.)

A. Reliable transmission

B. Operate at OSI Layer 2

C. Operate at OSI Layer 3

D. Create multiple broadcast domains

E. Create multiple collision domains

F. Flood input packets to all ports

G. Drop IP packets with invalid destination ports

Answer: B,E

Explanation:

“- a bridge is a two interfaces device that creates 2 collision domains, since it forwards the traffic it receivesfrom one interface only to the interface where the destination layer 2 device (based on his mac address) isconnected to. A bridge is considered as an “intelligent hub” since it reads the destination mac address in orderto forward the traffic only to the interface where it is connected” https://learningnetwork.cisco.com/thread/1734

QUESTION NO:24

Which two options describe services that are provided by TCP? (Choose two.)

A. session multiplexing

B. EtherTypes identify destination services

C. connection-oriented

D. best-effort packet delivery

E. binary translation

Answer: A,C

Explanation:

“TCP is a connection-oriented protocol.” http://www.diffen.com/difference/TCP_vs_UDP

QUESTION NO: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

QUESTION NO: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:

Bits -1 layer Frames – 2 layer Segments – 4 layer http://en.wikipedia.org/wiki/OSI_model

QUESTION NO: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:

http://en.wikipedia.org/wiki/Transport_layer

QUESTION NO: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:

Bits – 1 layer Packets – 3 layer http://en.wikipedia.org/wiki/OSI_model

QUESTION NO: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:

http://en.wikipedia.org/wiki/Internet_protocol_suite

QUESTION NO: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:

It defines the electrical and physical specifications of the data connection. It defines the relationship betweena device and a physical transmission medium (e.g. a copper or fiber optical cable). This includes the layout ofpins, voltages, line impedance, cable specifications, signal timing, hubs, repeaters, network adapters, host busadapters (HBA used in storage area networks) and more.” http://en.wikipedia.org/wiki/OSI_model

QUESTION NO:25

Which two options describe services that are provided by UDP? (Choose two.)

A. session multiplexing

B. segmentation

C. connection-oriented

D. reliable packet delivery

E. best-effort packet delivery

Answer: A,E

Explanation:

“UDP is faster because there is no error-checking for packets.” http://www.diffen.com/difference/TCP_vs_UDP

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