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Switching via memory
Traditional computers with switching between input and output being doen under direct control of the CPU input and output ports functioned as traditional I/O devices in a traditional operating systems. Aninput port with an arriving packet first signalled the routing processor. The packet was then copied from the input port into processor memory. The routing processor then extract the destination address from the heard looked up the appropriate output port in the forwarding table and the packet to the output buffers. Note that if memory bandwidth is B packets per second can be written into or read from memory them the overall forwarding throughput ( the total rate at which packets are transferred from input ports to output ports ) must be less than B/2.
What is Error Detection? What are its methods? Data can be corrupted during transmission. For reliable communication errors must be deducted and corrected. Error Detection uses
Single Program Multiple Date A common style of writing data parallel programs for MIMD computers is SPMD (single program, multiple data): all the processors implement the same
Determine the functioning of Service Support Service Support must be considered a strong point for hardware, especially for servers and should be available readily. Many brande
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Router#
Consider the following network example. Suppose that the distance vector (DV) routing algorithm is used to compute the distance between nodes. (a) Show the procedure of nod
Any protocol used by an internetwork to exchange routing data within an autonomous system. E.g. RIP, IGRP and OSPF.
One of the key roles of a System/Network Administrator is to monitor log files. This usually requires helper scripts (i.e. Perl programs) so a summary of large log files can be qui
How to protect computer Hardware by threats The first component in the computer system vulnerable to attacks or threats, and most important to be protected, is the hardware.
Wireless Phone Company (WLPC) is a provider of wireless phone service in the US with 100,000 customers serving mostly small markets. WLPC has just purchased additional airwaves in
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