Chapter 8 Flashcards
What is binary exponential back off
When there is collision on network, both computers hold for a period of randomly selected time interval to send next packet. If there is again collision, computer will double the delay time and then again select random delay period between 0-2d. Lets say there is again collision then computer again double the delay time and select delay time by random between 0-4d. and so forth. This procedure is called binary exponential back off.
What is delay time
When there is collision on network, both computers hold for a period of randomly selected time interval to send next packet. This time period is called delay time.
What is ethernet
The Ethernet card, or adapter, is the component that is actually installed in each computer that connects to the network via Ethernet cable; it is the hardware that the computer uses to transmit and receive data packets across the network and the Internet.
What is wireless LAN
It uses unguided media (e.g. radio frequency RF)
Does Bluetooth a wireless LAN technology
Yes
CSMA/CA uses which technology
Career sense multiple access collision avoidance uses wireless. In it, sender asks if receiver free or not before transmission.
What is local talk
It is invented by apple. Its a LAN technology uses bus topology. It follows principle of CSMA/CA. It comes free with Macintosh computer but it has low speed.
What is token ring
In this technology, ring network uses token as access method. Hardware must be designed to pass token even if attached computer is powered down. A machine can send 1 frame every time it receives one token.
What is FDDI
Fiber distributed data interconnect is a token ring technology that uses fiber optic. It is also known a self healing network because it uses stand by ring if first ring fails. It uses 2 rings (outer ring and inner ring) at a time and both use data in opposite direction. In this way it is more reliable.
What is ATM
Asynchronous transfer mode also known as star technology. In this technology data only send to destination and not to any other computer. We use fiber optic technology in ATM. ATM provides functionality that is similar to both circuit switching and packet switching networks: ATM uses asynchronous time-division multiplexing, and encodes data into small, fixed-sized packets (ISO-OSI frames) called cells.
