Routing with Linux

Question 1

Routing vs. Forwarding

Answer 1

Forwarding = data plane
-Direct packet to an output port/link
-uses forwarding table

Routing = control plane
-compute path
-creates forwarding table

Question 2

What sort of connection is BGP Peering? What does it allow two Autonomous systems to do?

Answer 2

-TCP connection
-Allows two AS to establish things about eachother

Question 3

Gateway

Answer 3

Something that sits at the edge of a network, or segment of a network

Question 4

What do gateways help with?

Answer 4

NAT,load balancing, QOS

Question 5

What is a good practice default action in a match table?

Answer 5

setting any “misc” traffic to be dropped

Question 6

What Load balancing is helpful for in networking

Answer 6

scaling and resilience

Question 7

Layer 4 vs. Layer 7 Load Balancing

Answer 7

Layer 4 looks at IP and TCP headers
–Also called network load balancer

Layer 7 considers Application headers
–May also be called a web proxy

Question 8

Traffic Shaping vs Traffic Managment

Answer 8

Shaping = ensure conformity of traffic to parameters

scheduling = determine which packets to transmit and which to drop

Question 9

What happens when a traffic queue is too big? Too small?

Answer 9

Too big = congestion
Too small = too many drops