Download CCENT: Cisco Certified Entry Networking Technician Study by Todd Lammle PDF

By Todd Lammle

Commence your coaching for Cisco's new CCENT entry-level networking certification, your access aspect into Cisco's well known CCNA certification tune. This complete examine consultant from top Cisco authority Todd Lammle completely prepares you for the Interconnecting Cisco Networking units, half 1 examination (640-822) and the beginning of a profession, with pages of examination necessities, real-world eventualities, and hands-on routines. issues contain the operation of knowledge networks, easy methods to enforce either switched and routed networks, and lots more and plenty extra.

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Additional resources for CCENT: Cisco Certified Entry Networking Technician Study Guide: ICND1 (Exam 640-822) (Exam 640-822 With CD)

Sample text

The OSI model is the primary architectural model for networks. It describes how data and network information are communicated from an application on one computer through the network media to an application on another computer. The OSI reference model breaks this approach into layers. In the following section, I am going to explain the layered approach and how we can use this approach to help us troubleshoot our internetworks. The Layered Approach A reference model is a conceptual blueprint of how communications should take place.

This framing of the packet continues for each hop until the packet is finally delivered to the correct receiving host. It’s really important to understand that the packet itself is never altered along the route; it’s only encapsulated with the type of control information required for it to be properly passed on to the different media types. 3 Defines how packets are placed on the media. Contention media access is “first come/first served” access where everyone shares the same bandwidth—hence the name.

11. D. FragmentFree LAN switching checks into the data portion of the frame to make sure no fragmentation has occurred. See Chapter 7 for more information. 12. A. By default, switches break up collision domains but are one large broadcast domain. See Chapter 1 for more information. 13. C. Segmentation happens at the Transport layer. See Chapter 1 for more information. 14. D. Stub networks have only one connection to an internetwork. Only default routes can be set on a stub network or network loops may occur.

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