6. OSPF STUB

Question 1

Which LSA types are not allowed in an OSPF stub area as defined by RFC 2328?

Answer 1

4,5 & 7

Question 2

What is the command every interface in the stub area needs to have?

Answer 2

area x stub

Question 3

Which TWO (2) stub area types are considered to be Cisco proprietary?

Answer 3

Totally Stub and Totally Not-so-Stubby

Question 4

How many virtual links are supported by OSPF stub area types?

Answer 4

None

Question 5

Which “bit” is known as the “stub flag”?

Answer 5

The E bit

Question 6

What is the totally stub area?

Answer 6

Cisco proprietary

Question 7

Which LSA types are not allowed in an OSPF totally stub area?

Answer 7

1 & 2

Question 8

Which command, when used on the ABR, is used to configure the Totally Stubby Area?

Answer 8

area x stub no-summary

Question 9

What is the value of the ‘E bit’ when a Totally Stubby Area has been configured?

Answer 9

0

Question 10

How many ASBRs are supported in a Totally Stubby Area?

Answer 10

0

Question 11

Which router is responsible for the injection of the default route into a Totally Stubby Area?

Answer 11

ABR

Question 12

Which LSA types are NOT found in OSPF Totally Not-so-Stubby Areas (NSSA)?

Answer 12

Type 3, Type 4, and Type 5

Question 13

Which OSPF configuration command is used to define an NSSA?

Answer 13

area x nssa no-summary

Question 14

Which OSPF bit is seen in HELLO packets for NSSA-capable routers?

Answer 14

N bit

Question 15

Which router is responsible for the filtering out of LSAs in an NSSA?

Answer 15

The ABR

Question 16

Where must internal summarization take place?

Answer 16

The ABR

Question 17

What area is used with internal summarization?

Answer 17

The area where it is coming from

Question 18

Where must external summarization take place?

Answer 18

ABR or ASBR

Question 19

The ‘null0’ route is also known by what other name?

Answer 19

The discard route

Question 20

Which ONE (1) statement below is TRUE for the E1 metric type?

Answer 20

The E1 metric value will never change once set

Question 21

Which ONE (1) statement below is TRUE for the E1 metric type?

Answer 21

The E1 metric value will never change once set VERKEERD!!

Question 22

Which command can be used to remove the ‘null0’ route?

Answer 22

no discard-route

Question 23

What is the default metric type for external routes that have been summarized in OSPF?

Answer 23

O E2

Question 24

Which ONE (1) statement below is TRUE for the E2 metric type?

Answer 24

The E2 metric value cannot be manually changed

Question 25

Which ONE (1) statement below is TRUE for the E2 metric type?

Answer 25

The E2 metric value cannot be manually changedVERKEERD!!

Question 26

Which ONE (1) command below would summarize the 192.168.0.0/24, 192.168.1.0/24, and 192.168.2.0/24

Answer 26

summary-address 192.168.0.0 255.255.252.0