by Dinesh Thakur Category: Communication Networks

• Tunneling is an internetworking strategy that is used when source and destination networks of same type are connected through a network of different type.

• In such a case, the packet from one network reaches the other network via different kind pf network that interconnects them.

 
by Dinesh Thakur Category: Communication Networks

The notion of quality of service, or QoS, concerns certain characteristics of a network connection under the sole of the network service provider liability.

A QoS value applies to the whole of a network connection. It must be identical at both ends of the connection, even if it is supported by several interconnected subnetworks each offering different services.

 
by Dinesh Thakur Category: Communication Networks

A switch, which resembles a hub, is known as switching hub. But there is stark difference between hub and switching hub or a switch. Hub acts as a LAN concentrator, and repeater. It consists of a single box with multiple ports. Each port is connected with a separate computer. A signal transmitted by a computer travels to all ports like a bus topology.



 
by Dinesh Thakur Category: Communication Networks

Now, in wider sense we may understand that a transmitter or sender may be a terminal (computer) responsible for with communication and application software controls the terminal and processes data. There may be more than one terminal connected to the sender.



 
by Dinesh Thakur Category: Communication Networks

A pair of wires twisted together form a twisted pair. They have more noise immunity than the two-wire open lines. Each wire is insulated and has thickness in the order of 0.016 inches to 0.015 inches.

 
by Dinesh Thakur Category: Communication Networks

With the advancement of time and intensive use of LAN, more workstations and more active users have resulted in more LAN traffic. Increased use of graphics and other bandwidth-intensive applications have increased LAN traffic. Other applications like video conferencing and multimedia have created a demand for fast LANs. Bandwidth of 10 Mbps, 16 Mbps and even 20 Mbps are becoming bottleneck. In response to this, Fast LANs have been developed, offering bandwidth of 100 Mbps and soon to 1 Gbps. Fast LAN options currently include:

 
by Dinesh Thakur Category: Communication Networks

Network Architecture defines the communications products and services, which ensure that the various components can work together. In the early days of data communication systems, the majority of communications were between the DTE and the host computer. Therefore, transmission control procedures were alone enough as communication protocols. However, recent computer systems link with other systems to form a network which result in a situation where different protocols serving different purposes are required. Hence, the network architecture represents a systemization of the various kinds of protocols needed to build a network.



 
by Dinesh Thakur Category: Communication Networks

Open Systems Interconnection (OSI) was set up as an international standard for network architecture. The International Organization for Standardization (ISO) took the initiative in setting up OSI. OSI has two meanings. It 'refers to:

 
by Dinesh Thakur Category: Communication Networks

This is also known as 10Base2, uses coaxial of thinner gauge of5 mm in diameter and bus topology as in the case of 10Base5 so that multiple computers can be connected to a single transmission line. Primarily it was used in office environments. The thinner cable is less costly to acquire and deploy, although its performance is less in terms of transmission distance. Because of its cost it is sometimes called as cheapnet. 10Base2 signifies in the same manner as 10Bases5except 2 is signified here as 200 meters maximum segment length (actually 185 meters).

 
by Dinesh Thakur Category: Communication Networks

The maximum allowable length of a segment for the 10Base5 is 500 meters. Up to 100 nodes can be connected to a segment. That is up to 100 transceivers can be connected. Repeaters are used to connect terminals that are separated from one another beyond the distance specified above, or to connect more than a limited number of nodes. Each repeater has two ports so that it receives signals through one of these ports and sends them through the other port after amplification. An example of the 10Base5 LAN, Up to 1024 nodes can be connected to a LAN expanded by using repeaters.

 
About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.



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