ENSA - Module 2 - OSPF Single Area Configuration

Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?

• 255.255.255.31
• 0.0.0.224
• 255.255.255.224
• 0.0.0.31
• 0.0.0.32

Refer to the exhibit. What is the OSPF cost to reach the North LAN 172.16.2.0/24 from East?​

• 1562400
• 66
• 1562064
• 64
• 1562500

Which command, if applied on an OSPF router, would give a Gigabit Ethernet interface a lower cost than a Fast Ethernet interface?

• (config-router)# auto-cost reference-bandwidth 1000
• (config-if)# ip ospf cost 1000
• (config-router)# ip ospf priorty 1000
• (config-if)# bandwidth 1000
• (config)# auto-cost refernece-bandwidth 10000

An OSPF router has three directly connected networks; 172.0.0.0/16, 172.1.0.0/16, and 172.2.0.0/16. Which OSPF network command would advertise only the 172.1.0.0 network to neighbors?

• router(config-router)# 172.1.0.0 0.0.0.0 area 0
• router(config-router)# 172.1.0.0 255.255.255.0 area 0
• router(config-router)# 172.1.0.0 0.0.255.255 area 0
• router(config-router)# 172.1.0.0 0.254.255.255 area 0
• router(config-router)# 172.1.0.0 255.255.0.0 area 0

When modifying a Router ID what command is used to to reset the election process?

• (config)# clear ip ospf process
• (config)# reset ip ospf process
• (router)# reset ospf process
• (router)# clear ip ospf process
• (config-router)# delete ospf process

A router becomes a DROTHER within a multi-access network and needs to send an update to all routers, what is the multicast address the DROTHER sends?

• 224.0.0.5
• 224.0.0.6
• 224.0.0.10
• 240.0.0.5
• 224.0.0.0

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 172.20.0.0 255.255.252.0. What wildcard mask would the administrator use in the OSPF network statement?

• 0.0.7.255
• 0.0.3.255
• 0.0.1.255
• 0.0.0.3
• 0.0.0.15

If the Hello timer is set to 20 what is the dead timer ?

• 80
• 40
• 20
• 60
• 100

What does the SPF algorithm consider to be the best path to a network?

• Path with the least number of hops
• Path with the smallest delays
• Path that includes the slowest cumulative bandwidth links
• Only those links that have a reference bandwith of 100,000bps
• Path that includes the fastest cumulative bandwidth links

What is the first criterion used by OPSF routers to elect a DR?

• Highest IP address
• Lowest priorty
• Highest priority
• Highest router ID
• Lowest router ID