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Firewalls
Firewalls emerged as a new technology in 1990s but its idea was present near two decades back. Historical context of "Firewall" is quite literal. It was in use to describe a barrier that separates a portion of a building dealing with fire, like a stove or a kitchen, from the rest of the structure. Later firewall found its use in connection with steam engines. It was described as a wall which separates an engine fire from passenger cars. Firewall ideas were greatly matured when Jeff Mogul from Digital Equipment Corporation published his papers in 1988 . His work described various processes that could be used to make networks secure. It was Marcus Ranum of AT&T Bell Laboratories who proposed the design of firewall and its components. He also coined the term "Firewall" for this quickly maturing technology. His work got much attention in 1990 and firewalls gained commercial popularity
What is ICMP? ICMP is Internet Control Message Protocol. It gives messaging and communication for protocols within the TCP/IP stacks. This is also the protocol that manages err
Can you describe RTP multiplexing in detail?
Post Office Protocol and Lightweight Directory Access Protocol POP: Post Office Protocol is a used by mail clients to download messages from a mail server on the Internet. L
The Transport layer implements reliable data transport services. The various functions of Transport Layer are listed below The transport layer is meant for transmitting the data
A modified NRZ code known as enhanced-NRZ (E-NRZ) operates on 7-bit words; inverting bits 2,3,6 and 7; and adding one parity bit to each word. The parity bit is chosen to make the
The hotel has a class C public address space. The network number is 203.220.72.0/24. The hotel provides a number of eatery, office, accommodation and conference like services. This
Can you explain in short what VPN is?
Ethernet Addressing Every station on the network must have a unique physical address Offered by a six-byte physical address encoded on the network interface card (NIC)
UDP Segment Structure The primary purpose of the UDP protocols is to expose datagram's to the application layer. The UDP protocols does very little and therefore employ
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