By Todd Lammle
Equipped by means of examination goals, this can be a concentrated, concise overview consultant that works hand-in-hand with any studying device, together with the Sybex CCNA: Cisco qualified community affiliate examine consultant, sixth and Deluxe editions.The e-book will encompass 4 high-level chapters, every one mapping to the 4 major domain names of the examination skill-set. The booklet will drill down into the specifics of the examination, protecting the following:Designing Cisco internetworksDeveloping an entry listEvaluating TCP/IP communicationConfiguring routers and switchesConfiguring IP addresses, subnet mask, and gateway addressesPerforming LAN, VLAN, and WAN troubleshootingUnderstanding principles for packet controlThe interactive CD comprises bonus checks, convenient flashcard questions, and a searchable PDF of a word list of phrases.
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Additional info for CCNA: Cisco Certified Network Associate: Fast Pass, Third Edition
TCP also performs these types of functions. Alternately, using UDP is like sending a postcard. To do that, you don’t need to contact the other party first. You simply write your message, address the postcard, and mail it. This is analogous to UDP’s connectionless orientation. Since the message on the postcard is probably not a matter of life or death, you don’t need an acknowledgment of its receipt. Similarly, UDP does not involve acknowledgments. Exam Essentials Remember the Host-to-Host layer protocols.
Cisco Discovery Protocol (CDP) is a proprietary protocol designed by Cisco to help administrators collect information about both locally attached and remote devices. By using CDP, you can gather hardware and protocol information about neighbor devices, which is useful info for troubleshooting and documenting the network. In the following sections, I am going to discuss the CDP timer and CDP commands used to verify your network. Getting CDP Timers and Holdtime Information The show cdp command (sh cdp for short) gives you information about two CDP global parameters that can be configured on Cisco devices: CDP timer is how often CDP packets are transmitted out all active interfaces.
Switches create separate collision domains but a single broadcast domain. Routers provide a separate broadcast domain for each interface. The term bridging was introduced before routers, switches and hubs were implemented, so it’s pretty common to hear people referring to bridges as switches. That’s because bridges and switches basically do the same thing—break up collision domains on a LAN (in reality, you cannot buy a physical bridge these days, only LAN switches, but they use bridging technologies, so Cisco still calls them multiport bridges).