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What if subnet mask is wrong?
Incorrect Subnet Mask: If a network uses a subnet mask other than the default mask for its address class, and a client is still configured with the default subnet mask for the address class, communication will fail to some nearby networks but not to distant ones.
What method of subnetting supports route summarization?
Classless routing protocols (such as RIPv2, OSPF, IS-IS, and EIGRP) support route summarization based on subnet addresses, including VLSM addressing. Classful routing protocols (RIPv1 and IGRP) automatically summarize routes on the classful network boundary and do not support summarization on any other bit boundaries.
Which is true about route summarization?
Route summarization is a method where we create one summary route that represent multiple networks/subnets. It’s also called route aggregation or supernetting. Summarization has a number of advantages: Saves memory: routing tables will be smaller which reduces memory requirements.
What are the two reasons why route summarization is important?
Summarization reduces the size of route tables, prevents route table instability due to flapping routes, and reduces the size of routing updates. Summarization enforces router authentication, preventing spurious updates from excessively loading the router.
Is route A summarization?
IS-IS supports summarization but since it is a link-state routing protocol, you can’t do this within an area as the link-state database have to be the same on all routers within the area. You can only configure summarization on a “border”. That would be an area border router or a router that is doing redistribution..
What is auto summarization in RIP?
Auto summarization is a feature which allows Routing Information Protocol (RIP) to summarize its routes to their classful networks automatically. For example, consider we are planning to use eight subnets of class B default network 172.16. 0.0/16, subnetted using a three-bit subnetting as shown below.
What happens if a client has an incorrect subnet mask?
Incorrect Subnet Mask: If a network uses a subnet mask other than the default mask for its address class, and a client is still configured with the default subnet mask for the address class, communication will fail to some nearby networks but not to distant ones.
What is the default subnet mask for Class B networks?
Class B networks use a default subnet mask of 255.255.0.0 and have 128-191 as their first octet. The address 172.16.52.63 is a class B address. Its first octet is 172, which is between 128 and 191, inclusive. Class C networks use a default subnet mask of 255.255.255.0 and have 192-223 as their first octet.
How many hosts are in a subnet mask 255 255 255 192?
The subnet mask 255.255.255.192 gives you four networks of 62 hosts each. It works because in binary notation, 255.255.255.192 is the same as 1111111.11111111.1111111.11000000. The first two digits of the last octet become network addresses, so you get the additional networks 00000000 (0), 01000000 (64), 10000000 (128) and 11000000 (192).
What happens when a packet arrives on a subnet?
When a packet arrives on the 192.168.123.0 subnet (from the local subnet or a remote network), and it has a destination address of 192.168.123.132, your computer will receive it from the network and process it. Almost all decimal subnet masks convert to binary numbers that are all ones on the left and all zeros on the right.