After developing a network on any scale, the first and most important thing a network administrator to do is to protect the network. This article demonstrates network security, solutions to different issues, tips to protect against anti-spamming, Trojan horses, viruses & malwares.
TCP is a reliable connection-oriented protocol used along with the Internet Protocol (IP) to transfer data in the form of packets between computers over the Internet.IP (Internet Protocol) takes care of handling the actual delivery of the data whereas TCP takes care of keeping track of the packets.
User Datagram Protocol is a connectionless protocol that runs on top of IP networks. In UDP messages are sent in the form of datagrams. As UDP is connectionless,so no handshaking takes place between the two processes on the end systems before transferring any sort of data.
The OSI model defines internetworking in terms of a stack of layers. The OSI Reference Model or OSI Model is a conceptual description for layered communications and computer network protocol design. In its most fundamental form, it separates network architecture into seven distinct layers.
Normally, Bandwidth Refers to the range of frequencies used to transmit data, but in computer networking, this term refers to the data rate supported by a network connection or channel. Channel refers to a path through which signal of
Wireless networks are types of computer networks in which the nodes are connected without a wire. These type of networks use radio waves to communicate among the computers and other devices. Wireless networks are getting popular because of easy setup features and no cabling involved.
In a broadcast or multicast channel, channel allocation is the main problem faced by the Medium Access Protocols. Channel Allocation Problem uses two main approaches to allocate a channel explained below :
- Static Channel Allocation
- Dynamic Channel Allocation
For accessing a channel we need to know some rules. These rules are used to access a channel as they serve as a communication source and facilitates data transfer and identification of device. Many algorithmic variations are possible for channel access. The following is a short list. -ALOHA -Carrier Sense Multiple Access Protocols -Collision-Free Protocols -Wireless LAN Protocols
TCP (Transmission Control Protocol) is a reliable connection-oriented protocol used along with the Internet Protocol (IP) to transfer data in the form of packets between computers over the Internet.IP (Internet Protocol) takes care of handling the actual delivery of the data whereas TCP takes care of keeping track of the packets
A Virtual Circuit is a connection oriented ,logical (not physical) communication link between two end systems on a packet switched network. By packet Switched, it means that a virtual circuit allows data and information to transfer
Connection Oriented And Connectionless Network Services