Routing Metrics Routing tables contain information used by switching software to select the best route. Routing algorithms have used many different metrics to determine the best route. Sophisticated routing algorithms can base route selection on multiple metrics, combining them in a single (hybrid) metric. All the following metrics have been used: •Path length •Reliability •Delay [...]

10Base2 – Ethernet specification for thin coaxial cable, transmits signals at 10 Mbps (megabits per second) with a distance limit of 185 meters per segment. 10Base5 – Ethernet specification for thick coaxial cable, transmits signals at 10 Mbps (megabits per second) with a distance limit of 500 meters per segment. 10BaseF – Ethernet specification for [...]

What is DNS? DNS – Domain Name System The essence of DNS is the intention of a hierarchical, domain – based naming scheme and a distributed database system for implementing this name scheme. It is primarily used for mapping host names and e-mail destinations to IP address but can also be used for other purposes. [...]

What is upward multiplexing? Multiplexing several conversations on to connections virtual circuits and physical links play a role in several layers of the network architecture. In the transport layer the need for multiplexing can arise in a number of ways. For example, if only one network address is available on a host, all transport connections [...]

What are the network layer design issues? The design issues are, Store-and-forward packet switching Services provided to the transport layer Implementation of connection less service. Implementation of connection oriented service Comparison of virtual circuit and datagram subnets. Write about the connection oriented service. If connection – oriented service is uses a path from the source [...]

What is attenuation? Attenuation is the loss of energy as the signal propagates outward. The loss is expressed in decibels per kilometer. The amount of energy loss depends on the frequency. What is SONET and what are the major goals of SONET? SONET- Synchronous Optical NETwork The Major goals are SONET had to make it [...]

What are various service primitives used? Primitive Meaning Request An entity wants the service to do some work Indication An entity is to be informed about an event Response An Entity wants to respond to an event Confirm The response to an earlier request has come back Differentiate Service Primitive and Protocol. A Service is [...]

How is a Broadcast Network Classified? Broad cast network can be further sub divided into static and dynamic depending on how the channel is allocated. Static: Divides the channel into discrete intervals and sun a round robin algorithm to allow systems to broadcast in its time slot Dynamic: Divided into a) Centralised : A Single [...]