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csc chp4 flashcards

topic = network layer

QuestionAnswer
what are some objects inside a router input ports / switching / output ports. / buffer management / scheduling
what is an IP regarding network layer internet protocol
what are some internet protocols datagram format / addressing / network address translation / IPv6
what does generalized forwarding mean match + action / openflow = match + action in action
what is the purpose of network-layer services and protocols transport segment from sending to receiving host
what is a senders job encapsulates segments into datagrams, passes to link layer
what is a receivers job delivers segments to transport layer protocol
where do network layer protocols reside in every internet device (host / router)
what do routers do examines header fields in all IP datagrams passing through it / moves datagrams from input ports to output ports to transfer datagrams along end-end path
what are two key network-layer functions network-layer functions and analogy (taking a trip)
what does forwarding and routing do in network-layer functions forwarding = move packets from router's input link to appropriate router output link routing = determine route taken by packets from source to destination
what does forwarding and routing do in analogy functions forwarding = process of getting through single interchange routing = process of planning trip from source to destination
what is a data plane local (per router function) determines how datagram arriving on router input port is forwarded to router output port
what is a control plane network-wide logic, determines how datagram is routed among routers along end-end path from source host to destination host
what are the two control-plane approaches traditional routing algorithms and software-defined networking (SDN)
where are traditional routing algorithms implemented implemented in routers
where are software-defined networking implemented implemented in remote servers
what is a per-router control plane individual routing algorithm components in each and every router interact in the control plane
what do SDN control planes do remote controller computes, installs forwarding tables in routers
what are some functions of services for individual datagrams guaranteed delivery / guaranteed delivery with less than 40msec delay
what are some functions of a flow of datagrams in-order datagram delivery / guaranteed min bandwidth to flow / restrictions on changes in inter-packet spacing
network-layer service model example slide 10-11
what can't internet "best effort" service model guarantee successful datagram delivery to destination / timing or order of delivery / bandwidth available to end-end flow
what are some characteristics of best-effort service simplicity of mechanism (allowing internet to be widely deployed) / sufficient provisioning of bandwidth (allowing performance of real time applications) / replicated, application-layer distributed services connecting close to clients network
Created by: NtokozoN
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