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NETWORK ANALYZERS:
A network analyzer also known network monitor or a network sniffer is used to calculate the performance of or debug a network.
It may report statistics such as capacity distribution of frame size, utilization, token circulation time or collision rate.
OPERATION OF NETWORK ANALYZERS:
The main idea behind the function of network analyzer is a device with a network interface that accept all frames, which is known promiscuous mode. Several desktop computers have interface that may be configured for promiscuous type. When combined with software computer can calculate any frame on LAN. In this way the interaction across LAN is have to be private. This device receives and displays frames on the LAN.
Network analyzer may be configured to process and filter frames. It may count frames of specific kind of size. It shows only frames from or to specific device. In general it may be configured to check any value of any field and save only these frames acting the filter specifications.
Unused Reserved This is a 6 bite field reserved for future use.
Link Layer To move to packet from one node( host or packet swtich0 to net node in the route the network layer relies on the services of the link layer. Particularl
The Address Resolution Protocol (ARP) sends out a broadcast to verify the MAC address from the IP address.
Split Horizon - If you attain a protocol's route on an interface, do not send information about that route back out that interface.
Hub A hub is a small box that connects individual devices on network so that these devices can communicate with each other. Hub is an inexpensive device. It is comm
Which command saves the configuration stored in RAM to NVRAM Ans) copy running-config startup-config is the command which saves the configuration stored in RAM to NVRAM
Each link layer process will have two connections: one "up" to the appropriate IP layer process, and one "sideways" to the link layer process on the simulated machine at the other
What is Proxy Sever and Firewall Proxy Sever Also known as a proxy or application level gateway. It is an application that breaks the connection among sender and receiver.
What is redirector? Redirector is software that intercepts file or prints I/O requests and changes them into network requests. This comes under presentation layer.
IEEE 802.4-Token bus Physical line or tree however logical ring. Stations know "left" as well as "right" stations. One token "passed" from station to station. Only station with
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