1.3 advanced routing Flashcards
What is PAT?
Port Address Translation: dynamic NAT that supports multiple device private IP translations at once. It does this by appending source and destination ports to IP addresses.
What is NAT?
Network Address Translation: translates a single private IP address into internet routable public IPs. Only works with one device.
Source NAT and destination NAT are also known as…
Source NAT = Port Address Translation/NAT overload
Destination NAT = port forwarding
What is port forwarding?
A form of static NAT, directs authorized inbound traffic on a particular port to a specific server or application on the network.
What are Mode A and Mode B in PoE?
Mode A: power over the data wire pairs
Mode B: power over the spare wire pairs
What is static NAT?
NAT with a consistent public IP address associated with a server on a network.
Port forwarding is an example.
What is dynamic NAT?
Router or NAT device gets a different public address from a pool each time the router translates the local address to a public address.
PAT is an example.
What is the primary difference between PAT and port forwarding?
PAT = Private IP on the network is a client/initiates connection
Port forwarding = Private IP on the network is a server/responds to forwarded requests.
What is Link-state routing?
routing protocols that route based on link speed, prioritizes fast bandwidth
What is distance-vector routing?
routing protocols that route based on with “hops” being the number of routers traffic passes through, prioritizes least number of hops.
What are some examples of circuit-switched networks?
POTS/Dial-Up
PSTN
T1/T3
ISDN
What are some examples of packet-switched networks?
DSL SONET/ATM MPLS Satelite WiFi cable modem
What is distributed switching?
A form of SDN that uses virtualized switches to preserve connectivity and propagate settings associated with a host or VM regardless of where the server is logically hosted, or physical layout.
What is an IGP? Examples?
Internal Gateway Protocol: Protocols used to route within an Autonomous System.
RIP, EIGRP, OSPF
What are four dynamic routing protocols?
RIP, EIGRP, OSPF, BGP
What are the characteristics of BGP?
It is dynamic routing protocol that routes between autonomous systems (EGP). It is hybrid (both link state and distance vector).
What are the characteristics of OSPF?
It is dynamic routing protocol that routes within an autonomous system (IGP). It is link-state.
What are the characteristics of RIP?
It is dynamic routing protocol that routes within an autonomous system (IGP). It is distance-vector.
What are the characteristics of EIGRP?
It is dynamic routing protocol that routes within an autonomous system (IGP). It is distance-vector.
