cisco ccna 200 301 braindumps

cisco ccna 200 301 braindumps.Exam Essentials By default, the Cisco-specific routing protocol EIGRP uses bandwidth and latency as metrics, but can also use both reliability, load, and MTUo20.1.2 Routing Tables and UpdatesEIGRP uses the diffusion update algorithm (DUAL) to update the local routing table. This algorithm stores neighbor routing information in the local topology table, making convergence extremely fast. If the primary route in the routing table fails, DUAL can take the alternate route from the topology table (the neighbor's routing table) and add it to the routing table without having to find an alternate path to the destination network by communicating with EIGRP neighboring routers.EIGRP supports both automatic and manual summarization. Don't forget that EIGRP is essentially a distance vector protocol, so it automatically summarizes routes at the boundaries of Class A, Class B, and Class C networks, as discussed in Chapter 7. You can also manually aggregate within the classified network. The configuration of aggregation is outside the scope of this book, but the Cisco CCNP material discusses this topic in depth.One of the features unique to EIGRP is that it supports three protocols that are routed: IP (IPv4 and IPv6) . Internet Packet Exchange (IPX) and AppleTalko In other words, EIGRP can route traffic for all three protocols at the same time. If you are running all three of these routed protocols in your network, using EIGRP is the best option. This reduces routing overhead by allowing you to run only one routing protocol, rather than one for each protocol being routed.EIGRP supports route summarization and can route IPv4, IPv6, IPX, and AppleTalk traffic. It uses the DUAL algorithm to create a topology with no routing loops.Authentication Scheduler 20.0220.2 How EIGRP WorksUnlike most other distance vector routing protocols, EIGRP is aware of parts of the network topology other than directly connected neighbors. Like OSPF, EIGRP uses Hello packets to discover neighbors and establish adjacencies (stored in the neighbor table) and to share routing information (stored in the topology and routing tables). o The destination address of an EIGRP Hello packet is the multicast address 224.0.0.10; on LANs, point-to-point connections, and multipoint connections with speeds greater than T1/E1, it generates Hell. The packet interval is 5 seconds, and on other connections it is 60 seconds. The failure time is three times the Hello interval.Exam Essentials EIGRP supports multicast and incremental updates. and generates multicast (224.0.0.10) Hello packets every 5 seconds on the LAN interface. Hello packets are used to maintain the EIGRP neighbor table and the EIGRP topology table in RAM.