A gateway operates at the upper levels of the OSI model and translates information between two completely different network architectures or data formats.
A router is a device in computer networking that forwards data packets to their destinations, based on their addresses.
Showing posts with label Computer Networks. Show all posts
Showing posts with label Computer Networks. Show all posts
Monday, 14 November 2011
What is passive topology?
When the computers on the network simply listen and receive the signal, they are referred to as passive because they don’t amplify the signal in any way. Example for passive topology - linear bus.
Thursday, 20 October 2011
What are the different type of networking / internetworking devices?
Repeater:
Also called a regenerator, it is an electronic device that operates only at physical layer. It receives the signal in the network before it becomes weak, regenerates the original bit pattern and puts the refreshed copy back in to the link.
Bridges:
These operate both in the physical and data link layers of LANs of same type. They divide a larger network in to smaller segments. They contain logic that allow them to keep the traffic for each
Also called a regenerator, it is an electronic device that operates only at physical layer. It receives the signal in the network before it becomes weak, regenerates the original bit pattern and puts the refreshed copy back in to the link.
Bridges:
These operate both in the physical and data link layers of LANs of same type. They divide a larger network in to smaller segments. They contain logic that allow them to keep the traffic for each
Wednesday, 19 October 2011
What is Project 802?
It is a project started by IEEE to set standards to enable intercommunication between equipment from a variety of manufacturers. It is a way for specifying functions of the physical layer, the data link layer and to some extent the network layer to allow for interconnectivity of major LAN protocols.
It consists of the following:
It consists of the following:
- 802.1 is an internetworking standard for compatibility of different LANs and MANs across protocols.
- 802.2 Logical link control (LLC) is the upper sublayer of
Tuesday, 18 October 2011
What are the types of Transmission media?
Signals are usually transmitted over some transmission media that are broadly classified in to two categories.
These are those that provide a conduit from one device to another that include twisted-pair, coaxial cable and fiber-optic cable. A signal traveling along any of these media is directed and is contained by the physical limits of the medium. Twisted-pair and coaxial cable use
a) Guided Media:
These are those that provide a conduit from one device to another that include twisted-pair, coaxial cable and fiber-optic cable. A signal traveling along any of these media is directed and is contained by the physical limits of the medium. Twisted-pair and coaxial cable use
Tuesday, 11 October 2011
What is difference b/w static IP address and dynamic IP address?
IP addresses assigned by a DHCP server are static dynamic IP addresses while the one released by IEEE (through the ISP) are dynamic IP addresses. OR
Static address is given by administrator manually.
Dynamic address is given by DHCP server. OR
Static address is given by administrator manually.
Dynamic address is given by DHCP server. OR
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