By Todd Lammle
Todd Lammle′s concentrated, concise evaluation advisor, up to date for the most recent CCNA tests CCNA is likely one of the such a lot wanted certifications for IT pros. If you′re getting ready for the CCNA Routing and Switching certification, this Sybex evaluate advisor bargains the simplest speedy assessment to be had. prepared by way of examination target, it’s the best complement to different studying instruments, together with the Sybex CCNA Routing and Switching examine consultant (ISBN: 9781118749616).
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Extra resources for CCNA Routing and Switching Review Guide Exams 100-101, 200-101, and 200-120
Here’s how that works: First, when a packet is received on a router interface, the destination IP address is checked. If the packet isn’t destined for that particular router, it will look up the destination network address in the routing table. Once the router chooses an exit interface, the packet will be sent to that interface to be framed and sent out on the local network. If the router can’t find an entry for the packet’s destination network in the routing table, the router drops the packet.
Don’t let this ever confuse you! You’ll still hear Cisco and others refer to LAN switches as multiport bridges now and then. Basically, switches are multiport bridges with more brain power and more ports! You would use a bridge in a network to reduce collisions within broadcast domains and to increase the number of collision domains in your network. Doing this provides more bandwidth for users. And never forget that using hubs in your Ethernet network can contribute to congestion. As always, plan your network design carefully!
Routers are used to create internetworks and provide connections to WAN services. Routers break up broadcast and collision domains as well. Select the Components Required to Meet a Given Network Specification 7 Select the Components Required to Meet a Given Network Specification The term bridging was introduced before routers and switches were implemented, so it’s pretty common to hear people referring to switches as bridges. That’s because bridges and switches basically do the same thing—break up collision domains on a LAN.
CCNA Routing and Switching Review Guide Exams 100-101, 200-101, and 200-120 by Todd Lammle