Computer Networks

Packet switching is one of the switching techniques that can be used to route the data from source to destination in a switched network. A switched network uses switches to connect multiple devices to form a large network. In a switched network, there can be numerous paths from source to destination. The switching technique identifies the best path among these multiple … [Read more...] about Packet Switching

A wired local area network is a local area network where the connectivity between different components or elements of the LAN is done using wires and cable. Well to implement the wired LANs various technologies were introduced such as token ring, token bus, FDDI, ATM LANs, and Ethernet. Among all these technologies only Ethernet survived the market as it has the capability … [Read more...] about Wired Local Area Network

Multiple access control is a method that allows multiple stations to share the same link. Well, the data link layer is responsible for the transmission of frames between the sender and receiver. We can classify the function of the data link layer into two types: Data Link Control Multiple Access Control The data link control protocols offer reliable communication … [Read more...] about Multiple Access Control

Data link layer design issues highlight the problems that network designers must address while designing the data link layer of any networking model. But before understanding these design issues, let us first understand the need for the data link layer. What is Data Link Layer? The data link layer is a layer in the networking model that transforms the raw transmission … [Read more...] about Data Link Layer Design Issues

Stream control transmission protocol (SCTP) is also a transport layer protocol like TCP and UDP. SCTP protocol includes the best features of TCP and UDP along with this it also supports the new applications supporting voice over the internet. In this section, we will discuss the working of SCTP and we will also discuss services provided by SCTP along with its … [Read more...] about Stream Control Transmission Protocol

The transmission control protocol (TCP) is a connection-oriented and reliable transport layer protocol that provides process-to-process communication. Like in user datagram protocol (UDP), we refer to the data transfer unit as user datagram in TCP we refer it to as a segment. Content: Transmission Control Protocol Introduction TCP Working TCP Services Advantages … [Read more...] about Transmission Control Protocol (TCP)

User datagram protocol (UDP) provides connectionless and unreliable process-to-process communication. It is a transport layer protocol. UDP has less overhead and provides faster delivery of the packets. UDP packets are referred to as user datagrams. Content: User Datagram Protocol (UDP) Introduction UDP Services Working UDP Applications Advantages and … [Read more...] about User Datagram Protocol (UDP)

Selective repeat protocol is a sliding window protocol that uses the concept of pipelining where multiple packets can be sent while the sender is waiting for the acknowledgement for the first sent packet. The selective repeat protocol manages error and flows control between the sender and receiver. In this section, we will discuss the need for selective repeat ARQ (Automatic … [Read more...] about Selective Repeat Protocol

Go-back N ARQ (Automatic Repeat Request)protocol is a practical implementation of the sliding window protocol. Well, there are two practical implementations of sliding window protocol, go-back-n and selective repeat. But in this section, we will be concentrating on the go-back-n protocol. Content: Go-Back-N Protocol Introduction Go-Back-N Definition Working with … [Read more...] about Go-Back-N Protocol ARQ

Among the transport layer services, the most important is to provide end-to-end communication between the process running on a source host and the corresponding process running on the destination host. There may be several processes running on the source host at the same time and there may be several processes running on the destination host. It is the responsibility of the … [Read more...] about Transport Layer Services