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CS 6250 TEST 1 | Q&A Latest
2025/2026 | 100% PASS
Standardized traffic routing between networks (all use IP), opens the
way for different protocols to be used at higher/lower levels.
IP responsible for moving traffic between networks (level 3), each
network may network may use tech they choose at lvl 1 and 2 to move
traffic within their net. Data can still traverse internet because IP glues
different networks together.
Higher layers (transport/application) operate strictly end-to-end. Since
IP works in the core of network, any end-to-end services may be built
on top of it. - Answer -How does the "narrow waist" allow a large
variety of different protocols to be used on the Internet?
Goals: Connect disparate individual (layer 2) networks by internetworking them with IP (layer 3).
ARP translates between different addressing schemes of IP (L3) and
Ethernet (L2).
E-2-E communication through IP (L3) because src/dest may not be on
same local (L2) network.