Unit 1

FUNDAMENTALS & LINK LAYER

Building a network – Requirements - Layering and protocols - Internet Architecture – Network software – Performance ; Link layer Services - Framing - Error Detection - Flow control

Part A

# Question
1 Enumerate error control techniques
2 Define Synchronous Time Division Multiplexing. Remembering
3 Give the need for flow control.
4 Compare RRP and HHP.
5 Demonstrate Manchester encoding, Differential Manchester
6 Summarize the salient features of packet switching.
7 Distinguish between peer-to-peer relationship and a primary-secondary relationship.
8 State Shannon�s Theorem
9 Discuss about Frequency Hopping.
10 Tell about Spread Spectrum
11 Point out the OSI layers by function
12 Show the importance of Bandwidth and Latency performance metrics in networking
13 What will the maximum number of frames sent but unacknowledged for a sliding window of size n-1, where n is the sequence number?
14 A digital signal bit rate of 2000bps. Formulate the duration of each bit.
15 Construct a network with N nodes connected in mesh topology.

Part B

# Question
1 Describe briefly the various layers and functions of OSImodel and compare OSI Model with Internet model. (16)
2 With a neat diagram describe in detail about the Network architecture. (16)
3 (i) S how the various performance metrics of network with examples. (8) (ii) How does a bit stuffing work in HDLC protocol. (8)
4 Expl ain in detail (i) NRZ,NRZI encoding schemes (8) (ii) PPP (8)
5 Disc uss in detail about Internet architecture. (16)
6 Give in detail about Framing and its types. (16)
7 Outl ineyourunderstandingingonnetworkinganddata transfer mechanism adopted in cable TV network.(16)
8 Illus trate the need for error detection with typical examples. Demonstrate the various methods used for error detection and error correction. (16)
9 (i)W rite a brief outline on the MAC Layer functions of IEEE 802.11 (8) (ii) Develop the key requirements of Wireless LAN (8)
10 Expl ain in detail about the implementation of network software(16)
11 Com pare Stop and Wait ARQ scheme with sliding window ARQ scheme. (16)
12 Ana lyzing the access method and the frame format used in Ethernet and Token ring. (8+8)
13 Sum marize Link layer functions in detail. (16)
14 Suppose we want to transmit the message M = 1 1 1 0 1 1with divisor bit as C= 1 1 0 1 whose polynomial is given byC(x) =x3+x2+1. Formulate themessage thatshould betransmitted using polynomial long division and predict theoccurrence of errors in the receiver.(16)