By Cisco Networking Academy
The Cisco CCNA Exploration curriculum presents a accomplished assessment of networking, from basics to complex functions and prone. This path emphasizes theoretical suggestions and functional software, supplying you with hands-on talents for designing, fitting, working, and preserving real-world networks. whereas wide on-line examine assets and accomplished textbooks can be found, many scholars and teachers have asked a inexpensive revealed source that may be used to check in areas the place web entry is probably not on hand. This publication is that source. Drawn without delay from the net curriculum, it covers each ability and competency coated within the most up-to-date CCNA Exploration Routing Protocols and ideas direction. This book allows you to learn offline, spotlight key issues, and take handwritten notes. All subject matters are correlated on to on-line websites, supporting you simply change among offline and on-line content material.
- Gives CCNA Exploration scholars a cheap examine source that may be learn at any place web entry isn't really to be had
- Handy published layout enables you to simply spotlight and make notes
- Page correlations hyperlink on to the net curriculum
- Covers the newest model of the CCNA Exploration Routing Protocols and ideas course
Read Online or Download CCNA Exploration Course Booklet: Routing Protocols and Concepts, Version 4.0 PDF
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Additional resources for CCNA Exploration Course Booklet: Routing Protocols and Concepts, Version 4.0
We have seen that routers are not involved only in Layer 3 routing decisions, but that they also participate in Layer 2 processes, including encapsulation, and on Ethernet networks, ARP. Routers also participate in Layer 1, which is used to transmit and receive the data bits over the physical medium. Routing tables contain both directly connected networks and remote networks. It is because routers contain addresses for remote networks in their routing tables that routers know where to send packets destined other networks, including the Internet.
Router R1 examines the destination MAC address, which matches the MAC address of the receiving interface, FastEthernet 0/0. R1 will therefore copy the frame into its buffer. 2. R1 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. 3. R1 decapsulates the Ethernet frame. 4. Because the destination IP address of the packet does not match any of R1’s directly connected networks, the router consults its routing table to route this packet.
What if this entry does not exist in the ARP table? PC1 sends an ARP request and router R1 sends back an ARP reply. Step 2: Router R1 receives the Ethernet frame 1. Router R1 examines the destination MAC address, which matches the MAC address of the receiving interface, FastEthernet 0/0. R1 will therefore copy the frame into its buffer. 2. R1 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. 3. R1 decapsulates the Ethernet frame.