BIT302 – Computer Networks

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PROGRAM

Bachelor of Science in Information Technology - B.SC(IT)

SEMESTER

III

SUBJECT CODE & NAME

BIT302 – Computer Networks

Qus:1 Discuss about different network hardware by scale.

Answer: In broadcast network, communication channel is shared by all the machines on the network. Broadcast systems allow the possibility of addressing a packet to all the destinations by specifying a special code in the address field. This packet is received and processed by every machine on the network

Qus:2 Discuss briefly about Byte-Oriented Protocols (BISYNC, PPP, DDCMP).

Answer: This is one of the oldest approach in framing, which consider each frame as a collection of bytes, rather than a collection of bits. Byte-oriented approach is represented by older protocols such

Qus:3 Discuss briefly Virtual-Circuit Networks.

Answer: Networks having connection oriented services in the network layer are called Virtual Circuit networks and these network layer connections are called virtual circuits (VCs). Let’s now consider how a VC

Qus:4 Discuss in details about OSI Reference Model.

Answer: The OSI Model is based on the protocol developed by ISO (International Standards Organization) as the first step towards international standardization of the protocols used in the various layers. This model deals with connecting open systems, so it is called ISO OSI (Open Systems Interconnectio

Qus:5 Discuss in details about Clock-based Framing (SONET).

Answer: Clock- based framing is another approach to framing, and is represented by the Synchronous Optical Network (SONET) standard. SONET was first proposed by Bell Communications Research (Bellcore), and then developed under the American National Standards Institute (

Qus:6 Discuss in details about Internet protocol version 4 (IPV4).

Answer: IPV4 is a connectionless protocol and is unreliable. It is primarily responsible for addressing and routing packets between hosts. A higher layer protocol such as TCP or an application protocol must acknowledge delivered packets and recover lost packets if required. IPV4 is defined in RFC 791. Figure shows the datagram format of IPV4. It consist of IPV4 header and Payload.

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