Computer Networks

Data Communication & Network Security Network Fundamentals Protocols Reference Models

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Computer Networks - Reference Models

In context of OSI or TCP/IP computer network models, which of the following is FALSE ?

A.	Besides span of geographical area, the other major difference between LAN and WAN is that the later uses switching element
B.	A repeater is used just to forward bits from one network to another one
C.	IP layer is connected oriented layer in TCP/ IP
D.	A gateway is used to connect incompatible networks
	Answer Report Discuss
	Option: C Explanation : Internet protocol layer (IP layer) provides totally connectionless services, but in OSI Model it provides both connection oriented and connection less services Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

The physical layer in reference to the OSI model defines

A.	data link procedures that provide for the exchange of data via frames that can be sent and received
B.	interface between X.25 network and packet mode device
C.	virtual circuit interface to packet-switched aservice
D.	All of these
	Answer Report Discuss
	Option: B Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

The main purpose of a data link content monitor is to

A.	detect problems in protocols
B.	determine the type of transmission used in data link
C.	determine the type of switching used in data link
D.	determine the low of data
	Answer Report Discuss
	Option: A Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

Which company develops the TCP/IP protocol for networking ?

A.	IBM
B.	DEC
C.	NOVELL
D.	DARPA
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

Error detection at the data link level is achieved by

A.	Bit stuffing
B.	Cyclic redundancy codes
C.	Hamming codes
D.	Both b and c
	Answer Report Discuss
	Option: B Explanation : Click on Discuss to view users comments. chandan kumar said: (7:57am on Saturday 6th July 2013) CORRECT ANS C Write your comments here: Updating your Comments.. Updating your Comments..

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