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The document discusses network layer protocols and the IPv4 and IPv6 packet headers. It describes the purpose of the network layer in data communication as addressing end devices, encapsulation, routing, and de-encapsulation. It explains that IPv4 requires other layers to provide reliability because it is media independent, unreliable, and connectionless. The major header fields of IPv4, such as version, DS, TTL, protocol, source IP address, and destination IP address are explained. Directly connected and remote network routing table entries are also discussed. Finally, it describes the applications and processes stored in router memory.
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- The MPLS architecture consists of label edge routers, label switch routers, label distribution protocols, and label forwarding tables.
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ccna1 chapter6
- 1. االتصاالتكلية الشبكات مبادئ السادس الفصل المتدرب عمل/الهاجــري سلطان
- 2. Section 6.1: Network Layer Protocols Upon completion of this section, you should be able to: Describe the purpose of the network layer in data communication. Explain why the IPv4 protocol requires other layers to provide reliability. (To include: media independent, unreliable, and connectionless.) Explain the role of the major header fields in the IPv4 packet. Explain the role of the major header fields in the IPv6 packet.
- 3. The Network Layer End to End Transport processes •Addressing end devices •Encapsulation •Routing •De-encapsulating NETWORK LAYER PROTOCOLS
- 4. Encapsulating IP ENCAPSULATING IP (CONT.)
- 6. IPv4 Packet Header •Version = 0100 •DS = Packet Priority •TTL = Limits life of Packet •Protocol = Upper layer protocol such as TCP •Source IP Address = source of packet •Destination IP Address = destination of packet
- 7. Directly Connected Routing Table Entries Route source – Identifies how the network was learned by the router. Destination network – Identifies the destination network and how it was learned. Outgoing interface – Identifies the exit interface to use to forward a packet toward the final destination.
- 8. Remote Network Routing Table Entries
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