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 | Jose Antonio Nunez |

| Term | Definition | 1 | An OSPF network | Attaches to multiple areas, maintains separatelink-state databases for each area it is connectedto, and routes traffic destined for or arriving fromother areas | 2 | Autonomous System Boundary Router (ASBR) | Is an OSPF router located between OSPF autonomous system networks and non-OSPF networks. | 3 | Backup Designated Router (BDR) | Is a router that becomes the Designated Router if the DR fails. | 4 | Database Description (DBD) | Contains an abbreviated list of the sendingrouter’s link-state database and is used by receiving routers to check against the local link-state database | 5 | Designated Router (DR) | Is an OSPF router that controls the routes of LSA’s or LSU’s. It helps maintain link state updates to other routers in the network. | 6 | DRothers | Is neither a DR, nor a BDR. They are other routers in the OSPF network. | 7 | Flapping link | Is when an advertised route between two nodes alternates back and forth. This creates a link state that cycles between up and down. | 8 | The highest IP address of an active router interface. | Router ID for an OSPF router if no loopbacks are configured? | 9 | link-state acknowledgment (LSAck) | This is an acknowledgement that an LSA or LSU packet has been received. | 10 | link-state advertisements (LSA) | Is a broadcasted link-state packet that contains link state information. This is helps maintain routing information. | 11 | Link-state Request (LSR) | Asks for more