Fill in the blanks below with either the term defined or the definition for the terms listed. Type answers in the appropriate cell; text will automatically wrap. Post your completed assignment to the dropbox.

NAME
Term / Definition
1 / Area Border Router / 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) / Attaches to more than one routing protocol and exchanges routing information with routers in different protocol networks
3 / Backup Designated Router (BDR) / After the DR (see below) is selected, a backup is selected which maintains the same info as the DR but stays in “standby” mode, waiting to become DR in the event the DR fails
4 / Database Description (DBD) Packet / Contains an abbreviated list of the sending
router’s link-state database and is used by receivingrouters to check against the local link-statedatabase
5 / Designated Router (DR) / Router chosen through an election process to maintain and distribute routing information for the network. This reduces network traffic over all routers maintaining and sharing individual routing tables
6 / DRothers / All routers in the network who are not the DR or BDR are called DRothers.
7 / Flapping link / Network cycling between up and down states
8 / Interface with highest IP address / Router ID for an OSPF router if noloopbacks are configured?
9 / link-state acknowledgment (LSAck) / Packets which acknowledge receipt of LSUs or other packets
10 / link-state advertisements (LSA) / Contain information about routes
11 / link-state requests (LSR) / Asks for more information about any entry inthe DBD
12 / link-state update (LSU) / Response to LSR with multiple LSAs included in a single LSU to reduce traffic
13 / Open Shortest Path First (OSPF) / An interior gateway protocol which gathers link state information and constructs a topology map of the network, used to open shortest paths first
14 / DR Priority / When this is not equal, the router with the highest
number will be the DR regardless of router ID
values
15 / RFC 2328 / Request for Comment #2328 describes the interior gateway protocol OSPF

OSPF Commands: Describe the results you would get from entering the commands below and how the results might be used by a network engineer.

Command / Description
16 / Router(config)# router ospf 123 / Creates OSPF process with process-id number of 123
17 / Router(config-router)# network 172.16.10.0 0.0.0.255 area 0 / Creates an OSPF area (0) configured on the interface 172.16.10.0
18 / Router(config-if)# ip ospf priority 50 / Sets or modifies the priority for the specific OSPF process
19 / Router(config-if)# bandwidth 128 / Sets or modifies the bandwidth for the OSPF process
20 / Router(config-if)# ip ospf cost 1564 / Allows for a specific interface cost to be assigned to an OSPF interface
21 / Router(config-if)# ip ospf hello-interval 20 / Allows for a specific hello interval value (in this case 20) to be assigned to a specific OSPF interface
22 / Router# show ip ospf / Displays general information about OSPF routing processes
23 / Router# show ip ospf neighbor / Displays OSPF-neighbor information for all known neighbors
24 / Router# show ip ospf neighbor detail / Displays OSPF-neighbor information in detail for a specified neighbor
25 / Router# show ip ospf interface / Displays OSPF-related interface information for the specified interface