How does address summarization reduce the routing table size?

The correct answer is A. By allowing a block of routes to be represented by one route. Address summarization (also called route aggregation) is a technique used in IP routing to combine several contiguous network prefixes into a single summarized route. This reduces the number of routes that need to be advertised and stored in routing tables, improving…

Network and Infrastructure Performance Management Integration

Question

Options

ABy allowing a block of routes to be represented by one route.
BBy only keeping best routes in the routing table.
CBy rejecting duplicate route advertisements.
DBy not advertising directly connected routes.

How the community answered

(19 responses)

A
68% (13)
B
5% (1)
C
16% (3)
D
11% (2)

Explanation

Address summarization (also called route aggregation) is a technique used in IP routing to combine several contiguous network prefixes into a single summarized route. This reduces the number of routes that need to be advertised and stored in routing tables, improving scalability and Option A is correct - summarization replaces many specific routes with a single aggregated route. Option B refers to best path selection (not summarization). Option C is incorrect; duplicate advertisements are still processed and filtered based on metrics. Option D is unrelated to summarization; directly connected routes are always advertised unless specifically filtered.

Topics

#address summarization#route aggregation#routing table#CIDR

Community Discussion

No community discussion yet for this question.

Full 4A0-100 Practice