IT430 Assignment Solution

IT430 Assignment Solution

Q1: Write down the functionality of Hub, Bridges, Routers, Repeaters and Switches; also write down on which layers of OSI model these network devices work? [5*2 = 10]
Name Functionality OSI Model Layer
Hub Provide central connection point for LAN computers. Physical layer
Bridges It is combination of software and hardware having own operating system, helps in conservation of network bandwidth. Bridges physically chopped up large network into small segments. Data link layer
Routers Routers are combination of software and hardware to forward data packets on the network. These are more efficient and sophisticated. It logically divide network into small segments, i.e subnets on the basis of IP addressing scheme. Network Layer
Repeaters It regenerates and amplifies the received signals. Physical layer
Switches It is also combination of software and hardware. It have own operating system, switches also increase the bandwidth of network. It virtually divide network into small segments, i.e VLANs. Data link layer

Q2: Perform the conversions [5*2 = 10]
(a) 110 Decimal to Binary
2 110
2 55 0
2 27 1
2 13 1
2 6 1
2 3 0
1 1
Decimal to Binary
110 = 1101110
(b) 10011000 Binary to Decimal
20*0 + 21*0 + 22*0 + 23*1 + 24*1 + 25*0 + 26*0 + 27*1
= 0+0+0+8+16+0+0+128
= 152
(c) 11011100 Binary to Decimal
20*0 + 21*0 + 22*1 + 23*1 + 24*1 + 25*0 + 26*1 + 27*1
= 0+0+4+8+16+0+64+128
= 220
(d) 11111100 Binary to Decimal
20*0 + 21*0 + 22*1 + 23*1 + 24*1 + 25*1 + 26*1 + 27*1
= 0+0+4+8+16+32+64+128
= 252
(e) 3009 Decimal to Binary
2 3009
2 1504 1
2 752 0
2 376 0
2 188 0
2 94 0
2 47 0
2 23 1
2 11 1
2 5 1
2 2 1
1 0
3009 = 101111000001