Download CCNA: Cisco Certified Network Associate Study Guide, 5th by Todd Lammle PDF

By Todd Lammle

Here's the e-book you must organize for Cisco's CCNA examination, 640-801. This learn consultant was once constructed to fulfill the exacting specifications of state-of-the-art Cisco certification applicants. as well as the attractive and obtainable educational strategy that has earned writer Todd Lammle the ''Best research advisor Author'' award in CertCities Readers' selection Awards for 2 consecutive years, this up-to-date 5th variation presents:

  • In-depth assurance of each CCNA examination aim
  • Expanded IP addressing and subnetting assurance
  • More distinct details on EIGRP and OSPF
  • Leading-edge examination guidance software program

Authoritative insurance of all examination targets, together with:

  • Network making plans & designing
  • Implementation & operation
  • LAN and WAN troubleshooting
  • Communications expertise

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Read Online or Download CCNA: Cisco Certified Network Associate Study Guide, 5th Edition (640-801) PDF

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Additional resources for CCNA: Cisco Certified Network Associate Study Guide, 5th Edition (640-801)

Sample text

Switches really add a lot of functionality to a network that hubs just don’t have. But most of us don’t have an unlimited budget. Hubs still can create a nice network—that is, of course, if you design and implement the network correctly. Let’s say that you have 40 users plugged into four hubs, 10 users each. At this point, the hubs are all connected together so that you have one large collision domain and one large broadcast domain. If you can afford to buy just one switch and plug each hub into a switch port, as well as the servers into the switch, then you now have four collision domains and one broadcast domain.

Routers use the logical address in a Network layer header to determine the next hop router to forward the packet to. Routers can use access lists, created by an administrator, to control security on the types of packets that are allowed to enter or exit an interface. Routers can provide layer 2 bridging functions if needed and can simultaneously route through the same interface. Layer 3 devices (routers in this case) provide connections between virtual LANs (VLANs). Routers can provide quality of service (QoS) for specific types of network traffic.

5 depicts a typical reliable session taking place between sending and receiving systems. Looking at it, you can see that both hosts’ application programs begin by notifying their individual operating systems that a connection is about to be initiated. The two operating systems communicate by sending messages over the network confirming that the transfer is approved and that both sides are ready for it to take place. After all of this required synchronization takes place, a connection is fully established and the data transfer begins.

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