Section 8 - Routing Flashcards
The first __ port numbers are considered to be “well-known” ports.
1024
True/False:
Ephemeral port numbers are considered to be anything above the “well-known” ports.
True
__ translates internal IP addresses to an Internet address and tracks the packets.
A) SNAT
B) DNAT
C) PAT
C) PAT
__ sends specific traffic to one internal IP address.
A) SNAT
B) DNAT
C) PAT
A) SNAT
__ has a limited pool of Internet addresses to give to a number of internal devices.
A) SNAT
B) DNAT
C) PAT
B) DNAT
Which type of router ships with NAT enabled by default: SOHO or Enterprise?
SOHO routers
Port __ allows external devices to have direct internal communication through a router.
Port forwarding
Port __ will open an alternative assigned port when the initial port is contacted (e.g.,FTP).
Port triggering
What hardware will often have a Web-based interface?
SOHO routers
What hardware will typically have its own OS interface?
Enterprise router
Provide the command(s) that displays current known routes from the routing table.
route print
netstat -r
Routing Tables contain address information regarding destination, __, __, and __.
Destination, subnet mask, gateway, and NIC.
True/False:
Dynamic routing protocols use metrics to determine routes and are either RIP1 or RIP2.
False; dynamic routing protocols use metrics to determine routes and are either Distance Vector or Link State.
True/False:
Dynamic routing protocols are either IGP or EGT.
False; Dynamic routing protocols are either IGP or EGP.
BGP is the __ protocol used for Inter-Autonomous System routing.
A) IGP
B) EGP
B) EGP
RIP is a __ __ protocol that uses hop count to determine routes.
A) Link State
B) Distance Vector
B) Distance Vector
RIP’s maximum hop count is __ hops.
A) 10
B) 15
C) 22
D) 67
B) 15
Which connection-type of dynamic routing protocol does OSPF use and which routing protocol group is it apart of?
Link State Protocol
IGP
Which connection-type of dynamic routing protocol does BGP use?
It’s a hybrid protocol, so it uses Link State and Distance Vector.
A __ is a box that connects network ID’s and contains at least two connections (resolves MAC addresses using IP addresses).
Router
What could we deduce if the Default Gateway is set to all 0’s from the information included in a Routing Table?
refer to table if necessary
We could establish that piece of hardware is connected to the local network and can be ARPed.
What does the Metric column tell us?
If there are two or more routing paths that the router could take, choose the path with the lowest Metric value (i.e., path A = 10, path B = 100: take path A).
Looking at a Routing Table, provide an example of input data that we would see for a Default Route.
Address - 0.0.0.0 Subnet - 0.0.0.0 Gateway - xxx.xxx.xxx.xxx Interface - xxx.xxx.xxx.xxx Metric - any
What is NAT and what does it stand for?
Network Address Translation; replaces the source IP address with its own IP address; allows us to have a lot of devices on the internet without using up all IP addresses in the world (a.k.a., Port Address Translation).
When might someone use Port Forwarding?
When playing games or downloading torrents, for example to direct internet communication directly to a device or devices using port numbers while passing through a router and/or firewall.
When might someone use Port Triggering?
When sending email, for example to temporarily open up a different port number to then receive communication back, hence triggering.
What does DMZ stand for and what is its purpose?
Demilitarized Zone; used to open all ports to the outside network.
What is Convergence?
A) the number of intermediate network devices through which data must pass between source and destination
B) all router tables reflect all routes.
B) all router tables reflect all routes.
What is Hop Count?
A) the number of intermediate network devices through which data must pass between source and destination.
B) all router tables reflect all routes.
A) the number of intermediate network devices through which data must pass between source and destination.
Which of these is not an influence of Dynamic Routing?
A) Bandwidth B) MTU C) Latency D) Area ID E) Cost
D) Area ID
IGP is to __ and __ whereas EGP is to __.
IGP is to RIP and OSPF whereas EGP is to BGP.
