By Wendell Odom, Rus Healy, Denise Donohue
The CCIE Routing and Switching certification is the main revered certification within the undefined. The profitable CCIE candidate needs to comprehend a large variety of community applied sciences that incorporates OSI version, bridging, LAN switching, IP and IP Routing protocols, multicast, WAN applied sciences, and function administration. The examination is notoriously tricky and CCIE applicants needs to first cross a qualifying written examination. The CCIE Routing and Switching examination Certification advisor, Fourth Ed., covers the entire issues of the 4.0 written examination. during this up-to-date version there are content material and alignment alterations in response to the revised v4.0 examination. the most recent version contains three hundred pages of latest content material masking the subsequent themes:
* community optimization
* BGP routing rules
* elevated QoS assurance
* extended WAN insurance
* elevated multicast coverage
* elevated MPLS assurance
* IPv6 redistribution
This booklet additionally includes the entire parts and contours of the best-selling examination Certification consultant sequence. those components contain especially designed overview and learn beneficial properties, equivalent to "Do i do know This Already?" quizzes that determine your wisdom and is helping you opt how a lot time to spend on each one part, beginning precis sections that spotlight crucial options for fast reference, and End-of-chapter inquiries to quiz you.
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Extra resources for CCIE Routing and Switching Exam Certification Guide (4th Edition)
No simulation questions are currently part of the written exam. As with most exams, everyone wants to know what is on the exam. com/ go/ccie. Cisco changes both the CCIE written and lab blueprints over time, but Cisco seldom, if ever, changes the exam numbers. ) Instead of changing the exam number when a CCIE exam changes significantly, Cisco publishes a new exam blueprint. Cisco assigns the new blueprint a version number, much like a software version. 0, as of the time of publication, is listed in Table I-1.
Ethernet devices can use FDX only when collisions cannot occur on the attached cable; a collision-free link can be guaranteed only when a shared hub is not in use. The next few topics review how Ethernet deals with collisions when they do occur, as well as what is different with Ethernet logic in cases where collisions cannot occur and FDX is allowed. Ethernet Layer 1: Wiring, Speed, and Duplex 9 CSMA/CD The original Ethernet specifications expected collisions to occur on the LAN. The media was shared, creating a literal electrical bus.
The three interested devices prepare by listening for frames sent to a particular multicast Ethernet address, 16 Chapter 1: Ethernet Basics processing frames destined for that address. Other devices may receive the frame, but they ignore its contents. ” Ethernet Address Formats The IEEE intends for unicast addresses to be unique in the universe by administering the assignment of MAC addresses. The IEEE assigns each vendor a code to use as the first 3 bytes of its MAC addresses; that first half of the addresses is called the Organizationally Unique Identifier (OUI).