Read e-book online Cisco CCNA CCENT Exam 640-802, 640-822, 640-816 Preparation PDF

By Dale Liu

ISBN-10: 1597493066

ISBN-13: 9781597493062

3 assessments, certifications, one whole Cisco education answer for networking pros! The CCNA examination is an entry-level IT certification from Cisco structures for execs fitting and conserving direction and switched networks. the present examination fabric covers networking ideas in addition to new and up-to-date content material on community defense basics and the fundamentals of instant networking. This booklet can be utilized as a examine advisor for both song you opt to obtain your CCNA - the one examination, 640-802 or the mixed 640-822 and 640-816, and for the CCENT certification which a scholar will obtain upon of entirety of the 640-822 examination. the writer group has prepared the content material that you can simply determine the targets for every 1/2 the mixed examination. * format of the consultant parallels the CCNA/CCENT examination targets for ease of analysis * info all features of the checks together with defense and instant networking necessities * Covers every thing from introductory to complex topics-keeping the newbie and intermediate IT specialist in brain * bankruptcy finishing questions and solutions enable for graduated studying * perform tests at the accompanying DVD aid dispose of test-day jitters

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Extra resources for Cisco CCNA CCENT Exam 640-802, 640-822, 640-816 Preparation Kit

Example text

This address (source and destination) is in the header of the Layer 2 “frame” to move data from one computing device to another over the frame relay cloud. As displayed above there are two ways to display the address of the device. Vendor OUI The first half of the MAC address is the Vendor Organizationally Unique Identifier; this part of the address identifies the company that makes the NIC. This address is a permanent part of the network card and cannot be changed. Spoofing Although the MAC address cannot be changed, some devices will let you present a different address to the LAN.

0/8. 0/24 networks. If you are using one of these networks you are conforming to the Internet standards. If you are using any other range of addresses and your Router/Firewall is using network address translation (NAT) you are still working within the guidelines of the Internet (using a NAT protocol called NAT overlapping where your inside addresses appear to be public and you are being translated to the true public Internet); however, if your Router/Firewall stops performing, the NAT function you will be changing the routing tables of the Internet and redirecting traffic to your network from the original network.

PPP provides the capability for a host to connect to a remote side using a modem. L2TP allows a host to connect to a remote side using a secure connection. Devices Devices that operate at this layer are ■■ NIC ■■ Bridges ■■ Multiport bridges (switches) MAC The MAC sublayer provides control for accessing the transmission medium. It is responsible for moving data packets from one NIC to another across a shared transmission medium such as an Ethernet or fiber-optic ­transmission medium. 51 52 CHAPTER 2: The Open Systems Interconnect Model Physical addressing is addressed at the MAC sublayer.

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Cisco CCNA CCENT Exam 640-802, 640-822, 640-816 Preparation Kit by Dale Liu

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