NETW204 Assignment 4
NETW204: Assignment 4, Link-state Routing and OSPF (50 points)
Fill in the blanks below with either the term defined or the definition for the terms listed. Each answer is worth 2 points each, 25 questions X 2 = 50 total points. Type answers in the appropriate cell; text will automatically wrap. Post your completed assignment to the dropbox.
NAME
Term
Definition
1
Area Border Router (ABR)
Attaches to multiple areas, maintains separate link-state databases for each area it is connected to, and routes traffic destined for or arriving from other areas
2
Autonomous System Boundary Router (ASBR)
The OSPF router located between an OSPF autonomous system network and a non-OSPF network. ASBRs run both OSPF and another routing protocol, such as RIP. ASBRs must reside in a non-stub OSPF area.
3
Backup Designated Router (BDR)
A router that becomes the designated router if the current designated router fails. The BDR is the OSPF router with the second-highest priority at the time of the last DR election.
4
Database Description (DBD)
Contains an abbreviated list of the sending router’s link-state database and is used by receiving routers to check against the local link-state database
5
Designated Router (DR)
OSPF router that generates LSAs for a multi-access network and has other special responsibilities in running OSPF. Each multi-access OSPF network that has at least two attached routers has a designated router that is elected by the OSPF Hello protocol
6
DRothers Routers that are not DR or BDR. They are the other routers in the OSPF network
7
Flapping link
Routing problem where an advertised route between two nodes alternates (flaps) back and forth between two paths because of a network problem that causes intermittent interface failures.
8
Numerically highest IP address
Router ID for an OSPF router if no loopbacks are configured?
9
link-state acknowledgment (LSAck)
Acknowledges receipt of LSA packet. Link-state
Fill in the blanks below with either the term defined or the definition for the terms listed. Each answer is worth 2 points each, 25 questions X 2 = 50 total points. Type answers in the appropriate cell; text will automatically wrap. Post your completed assignment to the dropbox.
NAME
Term
Definition
1
Area Border Router (ABR)
Attaches to multiple areas, maintains separate link-state databases for each area it is connected to, and routes traffic destined for or arriving from other areas
2
Autonomous System Boundary Router (ASBR)
The OSPF router located between an OSPF autonomous system network and a non-OSPF network. ASBRs run both OSPF and another routing protocol, such as RIP. ASBRs must reside in a non-stub OSPF area.
3
Backup Designated Router (BDR)
A router that becomes the designated router if the current designated router fails. The BDR is the OSPF router with the second-highest priority at the time of the last DR election.
4
Database Description (DBD)
Contains an abbreviated list of the sending router’s link-state database and is used by receiving routers to check against the local link-state database
5
Designated Router (DR)
OSPF router that generates LSAs for a multi-access network and has other special responsibilities in running OSPF. Each multi-access OSPF network that has at least two attached routers has a designated router that is elected by the OSPF Hello protocol
6
DRothers Routers that are not DR or BDR. They are the other routers in the OSPF network
7
Flapping link
Routing problem where an advertised route between two nodes alternates (flaps) back and forth between two paths because of a network problem that causes intermittent interface failures.
8
Numerically highest IP address
Router ID for an OSPF router if no loopbacks are configured?
9
link-state acknowledgment (LSAck)
Acknowledges receipt of LSA packet. Link-state