Computer Networks Answers

For the following configuration, construct a network design and assign the appropriate IP addresses for each device and the networks.

Three Routers : R0, R1, R2

Switches : Switch1,  Switch2, Switch3, Switch4

PCs : 9 PCs

Connectors:

Routers:

R0: se/0/0/0 is connected to R1 se/0/0/0

R0: se/0/0/1 is connected to R2 se/0/0/0

R1: se/0/0/1 is connected to R2 se/0/0/1

R0 : Gig0/0 to Switch1 Fa0/3

R1 : Gig0/1 to Switch2 Fa0/4

R1: Gig0/0 to Switch3 Fa0/3

R2 : Gig0/0 to Switch4 Fa0/3

LAN1

Switch 1: PC1 Fa0 is connected Switch 1 Fa0/1

Switch 1: PC2 Fa0 is connected Switch 1 Fa0/2

LAN2

Switch 2: PC3 Fa0 is connected Switch 2 Fa0/1

Switch 2: PC4 Fa0 is connected Switch 2 Fa0/2

Switch 2: PC5 Fa0 is connected Switch 2 Fa0/3

LAN3

Switch 3: PC6 Fa0 is connected Switch 3 Fa0/1

Switch 3: PC7 Fa0 is connected Switch 3 Fa0/2

LAN4

Switch 4: PC8 Fa0 is connected Switch 4 Fa0/1

Switch 4: PC9 Fa0 is connected Switch 4 Fa0/2

IPv4’s ARP and IPv6’s Neighbor Solicitation both map an address from one space to

another. In this respect they are similar. However, there are several differences. In what

major ways do they differ?

Note any areas where you may want or need some further explanation. Ask questions of your

fellow classmates.

Revisit the Discussion Forum often, responding to at least three other classmates and

responding to anyone who responded to your original post.

a)    English Class

For the host IP address, identify the prefix

192.168.10.1/

Identify the LSB (least significant bit)

Identify the Subnet ID to which the host belongs

Identify the broadcast address

Identify the usable range of host IP addresses

a)    Music Class

For the host IP address, identify the prefix

192.168.20.10/??

Identify the LSB (least significant bit)

Identify the Subnet ID to which the host belongs

Identify the broadcast address

Identify the usable range of host IP addresses

For the given IP address, determine the subnet, usable range of addresses, and Broadcast Address for Given Host 192.168.10.1;

a)    English Class

For the host IP address, identify the prefix

192.168.10.1/

Identify the LSB (least significant bit)

Identify the Subnet ID to which the host belongs

Identify the broadcast address

Identify the usable range of host IP addresses

As another example, consider a circuit-switched network that connects computers in two remote offices of a private company. The offices are connected using a T-1 line leased from a communication service provider. There are two 4 × 8 (4 inputs and 8 outputs) switches in this network. For each switch, four output ports are folded into the input ports to allow communication between computers in the same office. Four other output ports allow communication between the two offices. Figure shows the situation.

As a trivial example, let us use a circuit-switched network to connect eight telephones in a small area. Communication is through 4-kHz voice channels. We assume that each link uses FDM to connect a maximum of two voice channels. The bandwidth of each link is then 8 kHz. Figure shows the situation. Telephone 1 is connected to telephone 7; 2 to 5; 3 to 8; and 4 to 6. Of course the situation may change when new connections are made. The switch controls the connections

A processor uses a fixed-length 32-bit instruction format for a one address machine. The processor has 98 instructions.

a) Calculate the number of bits for opcode.

b) Calculate the number of bits for operand.

c) Calculate the maximum memory address that a program can in this machine can access.

d) Is it possible to expand the instruction set of this machine? Explain your answer

Justify whether it is possible to design an expanding opcode to allow the following to be encoded in 16-bit instruction? An address is 4 bits.

15 instructions with three addresses

14 instructions with two addresses

31 instructions with one address

18 instructions with zero address

a)    You have sub-netted your class C network 200.138.1.0/?? with a subnet mask of 255.255.255.224. Please list the following: number of networks, number of hosts per network, the full range of the first three networks, and the usable address range from those first three networks. Additionally, identify the broadcast addresses for each network.