cisco ccna study guides

cisco ccna study guides.Step 3. After receiving the packet from GW1, the Internet gateway (GW2) of unit B knows that the destination host of the packet is host B (the value of the destination IP address field in the IP packet header is the global IP address of host B 222.2).192.168.1.1 - the local IP address of Host B. Step 4. If Host B sends a packet in reply to Host A, it sends a packet with a source IP address of 192.168.1.1 (the local IP address) and a destination IP address of L1.1.1 (the global IP address of Host A). GW2 in unit B will follow a similarprocess of converting the source IP address of the packet to the global IP address of host B.Network Address Translation Network Address Translation Local IP 192.168.1.1 -----------A Global IP 1.1.1.1 Global IP 2.2.2.2 ------------> Local IP 192.168.1.1Figure 1-52 Letting two hosts with the same IP address and belonging to two separate units communicate with each other via NAT1.4 Internet Protocol and Layer 3 Technologies 55Distance vectors will continue to be exchanged between routers that are neighbors of each other until all routers generate a stablerouting table. At this point, the routing protocol reaches convergence. Routers that are neighbors also periodically exchange routing protocolmessages. If the link between the neighboring routers is broken, both routers can detect the failure and immediately notify theother neighboring router of each. Each neighboring router notifies its own neighboring router of the failure, updates the