IP address routing

Suppose a router has built up the routing table shown in Table below. The router can deliver packets directly over interfaces 0 and 1, or it can forward packets to routers R2, R3, or R4. Describe what the router does with a packet addressed to each of the following destinations (see Attachment)

Bridges

1. K is identical shared-medium CSMA/CD LANs are bridged together with K-1 bridges in a linear configuration. Each LAN has the same physical length L in meters and propagation speed is V m/s. The maximum number of nodes on each segment is N, and the maximum transmission rate is R bps. a. Which of these five parameters (K, L,V,N,R) have to be take into account to determine the minimum frame size that each node should put out. b. Give an equation for the minimum frame size M in bits in terms of your parameters.

Transmission rate

Host A digitizes real time speech by sampling at a rate of 8 Khz, and converting each sample on-the-fly to a 8 bit representation. As soon as 48 bytes of digitized speech have been collected, A immediately adds a 5 byte header to form a packet and starts transmitting the packet at a rate of 128Kbps to Host B. (At the same time it is collecting more speech bits to form the next packet.) Assume a total propagation delay of 4 msec, between A and B. As soon as Host B gets a complet packet , it is able to reconstruct and start playing out the analog speech waveform. a. How long does host A take to collect 48 bytes of digitized speech? b. What is the delay between speech at the input of Host A ... click for more

Transmission Delay

A two-port bridge connects on end of cable of length X m. to on end of a similar cable of length 3x/2 m. Hosts are attached at various points on the cable system, which operates as a shared-access LAN implementing the CSMA/CD protocol with a minimum frame length of 512 bits. The bridge imparts a delay in forwarding frames that is equal to a time duration (transmission delay) of a frame. Assume a bit rate of 100 Mbps on the cable, and a propagation speed of 2.5 x 10^8 m/s a. What is the minimum forwarding delay at the bridge? b. What is the maximum allowable value Xmax of X? c. The system is built with X-Xmax. An engineer argues that host on the sort side of the bridge can use a minimum f... click for more

Subnets

An organization owns the network 200.1.1.0/24 and wants to form subnets for 4 departments, with hosts as follows: A 72 hosts B 35 hosts C 20 hosts D 18 hosts There are 145 hosts in all. a. Give a possible arrangement of subnet masks to make this possible. b. Suggest what the organization might do if department D grows to 24 hosts.