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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.
DNS Tunneling – Domain Name Server "If, on one system, it is possible to transmit bits to another in any form, and in turn receive a reply as a result of that transmission, th
What is source route and OSPF? Source route It is a series of IP addresses identifying the route a datagram must follow. A source route might optionally be included in an
To use a subnet or classless address, table under routers and hosts that have address must keep two pieces of information with every address: the 32-bit address itself and another
What is the purpose of cables being shielded and having twisted pairs? The main purpose of this is to stop crosstalk. Crosstalks are electromagnetic interferences or noise that
Q. Explain physical layer of Osi reference model? - The physical layer deals among the physical characteristics of the transmission medium. - It defines the mechanical, elec
(a) You are provided with the following: A. An RSA facility complete with public/private key pair B. A CBC (cipher block chaining) facility incorporating the IDEA block ciph
What is D-AMPS D-AMPS uses 832 channels (in every direction) with three users sharing a sole channel. This allows D-AMPS to support up to the 2496 users simultaneously per cel
Q. Define V - 32 modem? - ITU-T's V.32 standard was issued in 1989 for asynchronous and full-duplex operation at 9600 bps. - Even though designed for asynchronous DTEs two
Q. Explain the Bit-Level Encryption? Bit-Level Encryption - Data is divided into blocks of bits then altered by encoding/decoding, permutation, substitution, exclusive OR
Router Routing achieved commercially popularity in the mid - 1980s - at a time when large-scale Internetworking began to change the fairly simple, homogeneous environments. Rou
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