15. High Availability and Disaster Recovery

Question 1

1. Which of the following backup types does not include the data?
   a. Full
   b. System state
   c. Clone
   d. Differential

Answer 1

b. Backing up the system state backs up only the configuration of the server and not the data.

Question 2

2. Which of the following is a measure back in time to when your data was preserved in a usable format, usually to the most recent backup?
   a. RTO
   b. MTBF
   c. RPO
   d. MTD

Answer 2

c. An RPO is a measurement of time from a failure, disaster, or comparable loss-causing event. RPOs measure back in time until your data was preserved in a usable format, usually to the most recent backup.

Question 3

3. Which of the following is an IEEE standard (RFC 2338) for router redundancy?
   a. HSRP
   b. VRRP
   c. HDLC
   d. MLPS

Answer 3

b. Virtual Router Redundancy Protocol (VRRP) is an IEEE standard (RFC 2338) for router redundancy; Hot Standby Router Protocol (HSRP) is a Cisco proprietary protocol.

Question 4

4. Which of the following is the defined interval during which each of the routers send out Hello messages in HSRP?
   a. Hold Timer
   b. Hello Timer
   c. Active timer
   d. Standby timer.

Answer 4

b. The hello timer is the defined interval during which each of the routers send out Hello messages. Their default interval is 3 seconds, and they identify the state that each router is in.

Question 5

5. What is the HSRP group number of the group with the following HSRP MAC address? 0000.0c07.ac0a
   a. 10
   b. 15
   c. 20
   d. 25

Answer 5

a. The last 8 bits (0a) are the only variable bits and represent the HSRP group number that you assign. In this case the group number is 10 and converted to hexadecimal when placed in the MAC address, where it becomes the 0a that you see.

Question 6

6. Which of the following provides fault tolerance?
   a. Two servers in an active/active configuration.
   b. Three servers in an active/passive configuration with one on standby.
   c. Three servers in an active/passive configuration with two on standby.
   d. Three servers in an active/active configuration.

Answer 6

c. With three servers in an active/passive configuration with two on standby, only one is doing work. Therefore, it does not provide load balancing, only fault tolerance.

Question 7

7. Which site type mimics your on-premises network yet is totally virtual?
   a. Cold site
   b. Cloud site
   c. Warm site
   d. Hot site

Answer 7

b. A cloud recovery site is an extension of the cloud backup services that have developed over the years. These are sites that whil mimicking your on-premises network are totally virtual.

Question 8

8. Which of the following fire suppression systems is not a good choice where computing equipment will be located?
   a. Deluge
   b. Wet pipe
   c. Dry pipe
   d. Preaction

Answer 8

a. Deluge systems allow large amounts of water to be released into the room, which obviously makes this not a good choice where computing equipment will be located.

Question 9

9. Which of the following protocols gives you a way to configure more than one physical router to appear as if they were only a single logical one?
   a. FHRP
   b. NAT
   c. NAC
   d. CMS

Answer 9

a. First Hop Redundancy Protocols (FHRPs) work by giving you a way to configure more than one physical router to appear as if they were only a single logical one. This makes client configuration and communication easier because you can simply configure a single default gateway and the host machine can use its standard protocols to communicate.

Question 10

10. Which of the following provides a method to join multiple physical switches into a single logical switching unit?
    a. Stacking
    b. Daisy chaining
    c. Segmenting
    d. Federating

Answer 10

a. Switch stacking is the process of connecting multiple switches together (usually in a stack) that are managed as a single switch.