Communications Protocols Standards

Your manager has asked you to describe the frame format of a typical Ethernet packet. Prepare a written report. Be sure to discuss Manchester encoding, and Ethernet performance as more hosts are added to a network.

Which of B, C, D can A reach?

Please see attached file for graph. Here is the question: A site is shown in Figure 4.57. R1 and R2 are routers; R2 connects to the outside world. Individual LANs are Ethernets. RB is a bridge router; it routes traffic addressed to it and acts as a bridge for other traffic. Subnetting is used inside the site; ARP is used on each subnet. Unfortunately, host A has been misconfigured and doesn't use subnets. Which of B, C, D can A reach?

File system that could be installed in a server of a local hospital

I'm trying to find a file system that could be installed in a server of a local hospital to support remote access of information by the hospital's doctors while they are using their mobile devices such as cellular phones or PDAs. I thought Window Server 2003 R2 (release 2) and its remote access Capability would be great, but I'm not sure wether this would fullfill the above statement. Basiclly what you need to do is tell me what File system you think wil fullfill the hospital's need and why do you think that will work in details. I have attached some info I have started. Add some more info and make any corrections that is needed. Please cite your sources.

Point to point links AND reverse path flooding

Assume we have a network of nodes connected via point to point links, and a source S sends a message that will be broadcast to all nodes using Reverse-Path-Flooding. Assume that routers do not keep track of broadcast messages they have seen earlier. Assume also that routing tables change frequently, however, when a node changes its next-hop neighbor towards S, it is always ensured that the spanning tree used in RPF is loop-free (i.e. all nodes remain connected to the tree and there are no loops, the integrity of the tree is preserved) Show that even with the above restrictions, it is possible that a message traverses the network and never stops (well, it will stop when its time-to-live... click for more

Ethernet Design cable length

In designing Ethernet, we must make sure that the length of cable in the LAN is shorter than the length of the shortest possible message that can be sent. Otherwise, a collision could go undetected. a. Let's assume that the smallest possible message is 64 bytes (including the 33 byte overhead). If we use 10BaseT, how long (in meters) is a 64-byte message? While electricity in the cable travels a bit slower than the speed of light, once you include delays in the electrical equipment in transmitting and receiving the signal, the effective speed is only about 40 million meters per second. (Hint: first calculate the number of seconds it would take to transmit the message then calculate the nu... click for more