Wireless WANs: Cellular Telephone and Satellite Networks Wireless WANs: Cellular Telephone and Satellite Networks * A repeater is a connecting device that operates in the physical layer of the Internet model. A repeater regenerates a signal, connects segments of a LAN, and has no filtering capability. * A bridge is a connecting device that operates in the physical and data link layers of the Internet model. * A transparent bridge can forward and filter frames and automatically build its forwarding table. * A bridge can use the spanning tree algorithm to create a loopless topology. * A backbone LAN allows several LANs to be connected. * A backbone is usually a bus or a star. * A virtual local area network (VLAN) is configured by software, not by physical wiring. * Membership in a VLAN can be based on port numbers, MAC addresses, IP addresses, IP multicast addresses, or a combination of these features. * VLANs are cost- and time-efficient, can reduce network traffic, and provide an extra measure of security. |
All times are GMT +5. The time now is 07:38 AM. |
Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.