Chapter 5: High Availability

Question 1

What are the components of High Availability?

Answer 1

Redundancy, Technology, People, Processes, and Tools

Question 2

What things are usually made redundant for High Availability?

Answer 2

Devices, WAN, Data Centres, and Facilities

Question 3

Network-Level Resiliency relies on monitoring using what?

Answer 3

NTP, SNMP, Syslog, and IP SLA.

Question 4

Tuned routing protocols failover in less than _ second(s).

Answer 4

1

Question 5

RSTP converges in about _ second(s).

Answer 5

1

Question 6

EtherChannel can failover in approximately _ second(s).

Answer 6

1

Question 7

HSRP timers are _ second(s) for hello and _ second(s) for hold time.

Answer 7

3 and 10

Question 8

What service will typically failover within 3-5 seconds?

Answer 8

Stateful service modules

Question 9

TCP/IP stacks have up to _ second(s) tolerance.

Answer 9

9

Question 10

The Supervisor redundancy mechanism in Cisco IOS enabling supervisor switchover at which layers?

Answer 10

Layers 2, 3, and 4

Question 11

What enables a standby RP to take control after fault on active RP?

Answer 11

SSO

Question 12

You should use what type of STP when you have distributed VLANs on Access Switches?

Answer 12

RSTP

Question 13

True or False: Place the Hot Standby Router Protocol (HSRP) primary and the STP primary root on the same distribution layer switch if you choose to load balance VLANs across uplinks?

Answer 13

True

Question 14

What first hop redundancy protocol was used before default gateways were supported on IP clients

Answer 14

Proxy Arp

Question 15

True or False: Proxy Arp is Disabled by Default

Answer 15

False

Question 16

Which first hop redundancy protocol does not provide any secondary path?

Answer 16

Static Default Gateway

Question 17

What is the Cisco-proprietary gateway redundancy protocol?

Answer 17

Hot Standby Router Protocol (HSRP)

Question 18

HSRP active and standby routers send hello messages to which multicast address?

Answer 18

224.0.0.2 UDP port 1985.

Question 19

What are the 5 states of HSRP?

Answer 19

Initial, Listen, Speak, Standby, Active

Question 20

What is the beginning HSRP state?

Answer 20

Initial

Question 21

If a route knows of the virtual routers IP address but is not active or standby and is waiting for Hello messages, it would be in which HSRP state?

Answer 21

Listening

Question 22

When a route is sending hello messages, it is in which HSRP state?

Answer 22

Speaking