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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. TCP connection set-up ii. Cumulative Acknowledgement (Given that Seq = 152, Data=8 bytes and 16 bytes) iii. Termination of a connection
(c) Describe the mechanism that is used to perform flow control in TCP.
(d) State the 3 major entities that consists the Electronic Mail system.
(e) For the network below (link costs shown), use the Link State algorithm (Dijkstra) to calculate the least cost route from C to all other nodes.
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) Se
Default size of frame is 1518 bytes
In IPSec what is SAD, SPD and SA's?
What is SMTP? SMTP is short for Simple Mail Transfer Protocol. This protocol deals with all internal mail, and gives the essential mail delivery services on the TCP/IP protocol
Define Choke packet and Implicit congestion signalling Choke packet: A choke packet is a control packet produced at a congested node and transmitted back to a source node to co
Circuit switching is a term used in communication where the communicating nodes will be connected through a dedicated channel before any communication may take place. The methodolo
FDDI Media Access Control Unlike CSMA/CD networks such like Ethernet token-passing networks are deterministic--you are able to calculate the maximum time that will pass before
State the methods to keep the attackers at bay Another best methods to keep the attackers at bay is known as network address translator or NAT. The philosophy behind the design
Data Transfer After connection is established bidirectional data transfer can take place. The client and server can both send data and acknowledgments. Figure show
Explain Point-to-Point connection type. Many point-to-point connections are associated with modems and PSTN (Public Switched Telephone Network) communications.
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