A data link layer runs a sliding window protocol. A transmits using a sending window size of 6 and B receives using a receiving window size of 1. We assume that A always has traffic to send and that B sends Acks only. The channel delay is large enough that A transmits 6 frames before receiving any acknowledgements from B. A begi ...continues
Frames arrive randomly at a 100 Mbps channel for transmission. If the channel is busy when a frame arrives, it waits its turn in a queue. Frame length is exponentially distributed with a mean of 10,000 bits/frame. For each of the following frame arrival rates, give the delay experienced by the average frame, including both queui ...continues
Measurements of a slotted ALOHA channel with an infinite number of users show that 10 percent of the slots are idle. a. What is the channel load, G? b. What is the throughput? c. Is the channel under-loaded or overloaded? Please explain all work.
star configuration & 802.3 LAN
A seven-story office building has 15 adjacent offices per floor. Each office contains a wall socket for a terminal in the front wall, so the sockets form a rectangular grid in the vertical plane, with a separation of 4 meters between sockets, both horizontally and vertically. Assuming that it is feasible to run a straight cable ...continues
Representative Network Topologies.
What are the different types of network topologies used on a LAN or WAN?
The teacher went over the following problem in class. However, I do not understand how he explains the work. He skips too many steps and jumps around. I have the final answer but I need a clear and complete explanation on how this problem is solved: Let A and B be two stations attempting to transmit on an Ethernet. Each has a ...continues
A datagram subnet allows routers to drop packets whenever they need to. The probability of a router discarding a packet is p. Consider the case of a source host connected to a source router, which is connected to the destination router, and then to the destination host. If either of the routers discards a packet, the source host ...continues
A CPU in a router can process 2 million packets/sec. The load offered to it is 1.5 million packets/sec. If the route from source to destination contains 10 routers (having no additional traffic), how much time is spent being queued and serviced by the CPUs. Assume Poisson arrivals and departures at each router.
A network on the Internet has a subnet mask of 255.255.240.0. What is the maximum number of hosts it can handle?
An organization has a class C network 200.1.1 and wants to form subnets for four 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 company might do if department D gro ...continues
