640-802 CCNA Study Guide - Elktech.org

Answer: A,C
Explanation:
Cisco 640-802 Exam
QUESTION NO: 184
What functions do routers perform in a network? (Choose two.)
A. packet switching
B. access layer security
C. path selection
D. VLAN membership assignment
E. bridging between LAN segments
F. microsegmentation of broadcast domains
Answer: A,C
Explanation:
(1) Intercept datagrams sent to remote network segments between networks, playing a translated
role.
(2) Select the most reasonable route to guide communications. In order to achieve this function,
the router will check the routing table based on certain routing communication protocol, and the
routing table lists all the nodes contained in the entire internet , the path conditions between nodes
and transmission costs associated with them. If a specific node has more than one path, then
select the optimal path based on pre-determined specifications. Because a variety of network
segments and their mutual connection situations may change, the routing information needs to be
updated in time, which is completed by timing update or updating according to changes
determined by the routing information protocol used. Each router in the network dynamically
updates its routing table according to this rule to maintain effective routing information.
(3) When forwarding datagrams, in order to facilitate transferring datagrams between networks,
routers will divide large data packets into appropriate sized data packets according to predetermined
specifications, and those appropriate sized data packets will be turned into their
original form when reaching the destination.
(4) Multi-protocol routers can connect and use network segments of different communication
protocols, they can be used as communication connecting platforms of network segments of
different communication protocols.
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