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802.11 DSSS
a) Direct sequence spread spectrum in a 2.4 GHz band
b) Each bit is replaced by a sequence of bits called a chip code, implemented at the physical layer
c) Sender splits each byte of data into several parts and sends them concurrently on different frequencies
d) Data rate is 1 or 2 Mbps
IP plus port (IP on layer 3 and port on Layer 4 - In Encapsulation, socket base decision on Network Layer -Layer 3)
What is Synchronous TDM? In STDM, the multiplexer allocates exactly the same time slot to every device at all times, whether or not a device has anything to transmit.
explain Learning Bridges in deatil.
Given a five station token bus LAN with station addresses of 3000, 500, 100, 70, and 50. Stations with addresses of 5000, 4000, 400, 90, and 60 are waiting to enter the ring. Assum
2300 words
Connections in ATM are known virtual circuits or virtual channels These are known virtual, since connections are created in ATM by starting values in memory locations (tables) in A
Protocol Layers and their Service Models The internet is an extremely complicated system. It consists of many pieces like numerous applications and protocols various t
Time out Timers are used to protect against lost packet. Each packet must have its own logical timers since only a single packet will be retransmitted after timeou
1. Consider these two potential additions to the MIPS instruction set and explain how they would restrict pipelining. a) cp d1(r1), d2(r2) copy contents of word at address
Switches operate at layer 2. They enhance bandwidth by decreasing the number of devices sharing the media. They isolate collisions. Like a bridge they forward traffic based upon la
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