COMPUTER NETWORKING CHAPTER 5 EXAM
2026 ELITE REVIEW WITH ACTUAL QUESTIONS
AND VERIFIED CORRECT ANSWERS ALREADY
PASSED A+
◉Routing function . Answer - To determine route taken by packets from
source to destination.
◉Local forwarding table: . Answer - In a router it holds entries to
determine the outgoing link interface for forwarding arriving packets. It
also, helps to direct packets through the switching fabric efficiently.
◉Routing algorithm . Answer - This algorithm determines which output
line of incoming packet should be transmitted on.
◉Two approaches to structuring network control plane: . Answer - Per-
router control (traditional) logically and centralized control (software-
defined networking).
◉Differences between per-router forwarding and SDN approaches: .
Answer - In Per-router forwarding, the routers independently compute
, forwarding tables, with control plane information exchanged directly
between routers, while in the SDN approach, a centralized controller
computes and manages forwarding tables, with routers relying on CAs to
receive and implement these configurations without inter-router
communication.
◉Internet's network layer best-effort service . Answer - Default model
for the internet, in this service there is no guaranteed that packets will
received in the order in which they were sent, or that they will be
eventually delivered There is, also, no guarantee of the end-to-end delay
or minimal bandwidth.
◉Components of a router: . Answer - Input ports, Switching Fabric,
Output ports, and Routing processors.
◉Input port . Answer - It handles incoming packets, performing physical
layer and data link layer functions. Determine where each packet should
go next by consulting the forwarding table.
◉Switching fabric: . Answer - Internal network within a router that
allows packets to be transferred from an input port to an appropriate
output port.
◉Output port . Answer - Interface in a router where packets are sent out
to reach their destination after processing.
2026 ELITE REVIEW WITH ACTUAL QUESTIONS
AND VERIFIED CORRECT ANSWERS ALREADY
PASSED A+
◉Routing function . Answer - To determine route taken by packets from
source to destination.
◉Local forwarding table: . Answer - In a router it holds entries to
determine the outgoing link interface for forwarding arriving packets. It
also, helps to direct packets through the switching fabric efficiently.
◉Routing algorithm . Answer - This algorithm determines which output
line of incoming packet should be transmitted on.
◉Two approaches to structuring network control plane: . Answer - Per-
router control (traditional) logically and centralized control (software-
defined networking).
◉Differences between per-router forwarding and SDN approaches: .
Answer - In Per-router forwarding, the routers independently compute
, forwarding tables, with control plane information exchanged directly
between routers, while in the SDN approach, a centralized controller
computes and manages forwarding tables, with routers relying on CAs to
receive and implement these configurations without inter-router
communication.
◉Internet's network layer best-effort service . Answer - Default model
for the internet, in this service there is no guaranteed that packets will
received in the order in which they were sent, or that they will be
eventually delivered There is, also, no guarantee of the end-to-end delay
or minimal bandwidth.
◉Components of a router: . Answer - Input ports, Switching Fabric,
Output ports, and Routing processors.
◉Input port . Answer - It handles incoming packets, performing physical
layer and data link layer functions. Determine where each packet should
go next by consulting the forwarding table.
◉Switching fabric: . Answer - Internal network within a router that
allows packets to be transferred from an input port to an appropriate
output port.
◉Output port . Answer - Interface in a router where packets are sent out
to reach their destination after processing.
