By Cisco Networking Academy
The Cisco CCNA Exploration curriculum offers a entire evaluation of networking, from basics to complicated purposes and companies. This direction emphasizes theoretical suggestions and functional program, supplying you with hands-on talents for designing, fitting, working, and holding real-world networks. whereas vast on-line examine assets and entire textbooks can be found, many scholars and teachers have asked a reasonably cheap published source that may be used to check in locations the place net entry will not be on hand. This e-book is that source. Drawn without delay from the net curriculum, it covers each ability and competency lined within the most modern CCNA Exploration Routing Protocols and ideas path. This e-book helps you to learn offline, spotlight key issues, and take handwritten notes. All themes are correlated on to on-line web content, assisting you simply change among offline and on-line content material.
- Gives CCNA Exploration scholars a cheap examine source that may be learn anywhere net entry isn't really to be had
- Handy revealed structure allows you to simply spotlight and make notes
- Page correlations hyperlink on to the web curriculum
- Covers the most recent model of the CCNA Exploration Routing Protocols and ideas course
Read or Download CCNA Exploration Course Booklet: Routing Protocols and Concepts, Version 4.0 PDF
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Extra info for CCNA Exploration Course Booklet: Routing Protocols and Concepts, Version 4.0
4 Path Determination Path Determination Packet forwarding involves two functions: ■ Path determination function ■ Switching function The path determination function is the process of how the router determines which path to use when forwarding a packet. To determine the best path, the router searches its routing table for a network address that matches the packet’s destination IP address. One of three path determinations results from this search: Directly Connected Network - If the destination IP address of the packet belongs to a device on a network that is directly connected to one of the router’s interfaces, that packet is forwarded directly to that device.
In this case, the Layer 2 encapsulation is PPP; therefore, the data link destination address is set to a broadcast. Remember, there are no MAC addresses on serial interfaces. 0 5. The IP packet is now encapsulated into a new data link frame, PPP, and sent out the serial 0/0/0 exit interface. Step 4: The packet arrives at R3 1. R3 receives and copies the data link PPP frame into its buffer. 2. R3 decapsulates the data link PPP frame. 3. R3 searches the routing table for the destination IP address of the packet.
The IP packet is encapsulated into a new data link, Ethernet frame and sent out R3’s FastEthernet 0/0 interface. Step 5: The Ethernet Frame with encapsulated IP packet arrives at PC2 1. PC2 examines the destination MAC address, which matches the MAC address of the receiving interface, its Ethernet NIC. PC2 will therefore copy the rest of the frame into its buffer. 2. PC2 sees that the Ethernet Type field is 0x800, which means that the Ethernet frame contains an IP packet in the data portion of the frame.
CCNA Exploration Course Booklet: Routing Protocols and Concepts, Version 4.0 by Cisco Networking Academy