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Q. Why congestion occurs?
Congestion
Emerge if the load on the network is greater than the capacity of the network
- Load that is the number of packets sent to the network
- Capacity that is the number of packets a network can handle
Why congestion occurs?
- Because routers and switches have queues that hold the packets before and after processing
Congestion control: keep the load below capacity
The packet is place at the end of the input queue
The processing module moves the packet from the queue and forwards the packet
The packet is put in an appropriate output queue
show ipx servers is the command that shows the SAP table
Qustions: Simplify the following expression using a Karnaugh map: F = XY‾Z + X‾Y‾Z + XY Z +X‾ Y Z
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.
Describe autonomous system?
Q. Explain the Public-Key Cryptography? Public-Key Cryptography - Each user has the same encryption algorithm and key - Decryption algorithm also key are kept secret
Recognize the command to show the status of the Frame Relay virtual circuit Ans) Router# show frame-relay pvc
Question: (a) With the help of a diagram, describe a typical DNS system. (b) Using signal sequence or state transition diagrams, illustrate the following scenarios: i.
Ans) The Transport Layer : Segments upper-layer applications. Establishes an end-to-end connection. Sends segments from one end host to another. Optionally, make sures
A logical circuit that is created by Virtual channel links. It carries data among two endpoints in a network. The one more name for Virtual Channel is Virtual Circuit.
Can you describe the concept of DHCP?
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