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Computer Networks
A computer networks can be defined as set of computer that interact among the individual computers sharing resources or information. Reference models have been establish the functions of certain layers in the network for proper performance. The followings section introduce two reference models the open system interconnection (OSI)model established by the international Organization for Standardization (ISO) and the transmission control protocol. Internet Protocol ( TCP / IP) model.
Advantage of IP sec Tunnelling Mode IP Sec tunnelling mode has the following advantages: a.Security : Ts IP sec tunnelling mode secure somewhat but not the best. In a
What is routing region? When hierarchical routing is used, the routers are separated into what we call regions, with each router knowing all the details about how to route pack
Elements of protocol
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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.
Bridges - Operate in both physical and data link layers - Utilized to divide a network into smaller segments - May as well relay frames between separate LANs - Keeps t
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
High Availability Oracle web cache supports content aware load balancing and fail over detection. The features ensure that cache messes are directed to the most avai
Connection Oriented Transport TCP In addition to providing reliable communication transmission control protocols effects errors control flow control and resequencing of
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