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Class lecture notes for third Year,sixth semester Computer Networks (Subject Code: EC) is available here in PDF formats for you to. In recent years, the network that is making significant impact in our day-to-day life is the Computer network. By computer network we mean an interconnected set. EC / EC62 / EC Computer Networks Complete Notes-Unit Wise ECE 6th Semester Regulation | BE Electronics and Communication.

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EC2352 Computer Networks MJ2014 Question Paper

One connection is used for data transfer, the other for control information. List out the steps followed is checksum checker side. What is meant by switched virtual circuit? What is function of transport layer? In public key, there are two keys: The three HDLC station types are: It allows additional text to include codes that define fonts, layouts, embedded graphics and hypertext links.

Like Ethernet, station communicates via a common bus. The stations are configured in 3 ways a Unbalanced configuration b Symmetrical configuration c Balanced configuration What are the functions of a DTE?

What are the steps followed in checksum generator? Fiber distributed data interface is a local areas. Write the keys for understanding the distance vector routing. Raghavendra Reddy Malapati Page 9 In distance vector routing, cost refer to hop count while in case of link state routing, cost is a weighted value based on a variety of factors such as security levels, traffic or the state of the link.


Token Bus is a physical bus that operates as a logical ring using tokens. The most important criteria are performance, reliability and security. Group the OSI layers by function. The dividing process is called segmentation. If a frame is corrupted in transit, a NAK is returned and the frame is resent out of sequence.


A logical circuit made between the sending and receiving computers. A brouter is a single protocol or multiprotocol router that sometimes acts as a router and sometimes acts as a bridge.

Here stations are logically organized into a ring. What are the responsibilities of network layer? E Civil 5th Semester Question What is the difference between a passive and an active hub?

What is meant by hop count? What is token passing?

Where is the Menu? The connection is made after both computers do handshaking. The MTA transfers the mail across the Internet. The control data added to the end of a data is called trailers. What are the four aspects related to the reliable delivery of data? Raghavendra Reddy Malapati Page 8 6. What is a digital signature? It is similar to that of signing transactions documents when you do business with a bank. Each station may transmit only during its turn and may send only one frame during each turn.

What is the purpose of hamming code? Why is an application such as POP needed for electronic messaging? Creating a connection involves three steps: These bits are called framing bits.

Raghavendra Reddy Malapati Page 14 Disadvantage: The receiver must follow these steps a The unit is divided into k section each of n bits. T ransport layer delivery: Permutation is transposition in bit level.


Two entities cannot just send bit streams to each other and expect to be understood. Data circuit-terminating equipment is a device used as an interface between a DTE and a network.

It supports data rates of Mbps and provides a high-speed alternative to Ethernet and token ring access method used here is token passing. Co-ordination across the nodes of a network is necessary for an efficient communication.

EC Computer Networks Lecture Notes – SEC Edition

The third and most powerful of the redundancy checking techniques is the cyclic redundancy checks CRC CRC is based on binary division.

Give the usage of I, S, U frames. The control connection uses very simple rules of communication. How to request Study Material? Discuss the mode for propagating light along optical channels There are two modes for propagating light along optical channels, networka and single mode.

In networks, communication occurs between the entities in different systems. Intel Corporation and Xerox. This information is added in the form of headers or trailers.

What are the duties of the transport layer?