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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
Normal 0 false false false EN-IN X-NONE X-NONE Networks classification
Most networks give dynamic connections, which last for a relatively short period. To operate this, ATM can dynamically join a switched virtual circuit (SVC), allow it last as long
Default IPX Ethernet encapsulation is Novell-Ether
Consider figure. Assume a new flow E is added that takes a path from R1 to R2 to R6. How does the max-min bandwidth allocation change for the 5 flows?
Routing Information Protocol (RIP) is a distance vector routing protocol that used hop count as its metric. The maximum hop count is 15, 16 hops are considered unreachable. RIP upd
BRIDGES: A bridge is a hardware device also needed to connect two LAN code segments to extend a LAN. A bridge uses two NICs to connect two code segments. It listens to all tr
Security risks present on the networks Lots of risks are present everywhere on Internet as well as on Intranet, if it is not known what is being done. Every day a number of
- The ISO (International Organisation for Standardisation) is an International standards organisation responsible for a wide range of standards including many that are relevant to
Elements of protocol
What are the disadvantages of Star Topology? The disadvantages are considered as follows: a. Needs more cable than most topologies. b. Moderately complex to install.
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