Lesson 13

Question 1

A ________ is a collection of servers that provides the infrastructure for replicating and activating database copies.

Answer 1

Database Availability Group (DAG)

Question 2

DAGs:
Require the failover clustering feature of _______, although all installation and configuration is done with the __________ tools ______

Answer 2

Server 2008R2/2012
Exchange Server management
(EAC or EMS)

Question 3

DAGs:

Use _______ to control failover

Can be created after the ________ is installed

Allow a _____ to be activated on another server in the group without affecting other databases

Allow up to __ copies of a single database on separate servers

Define the ______ for replication

Answer 3

Active Manager
Mailbox server
single database 
16
boundary

Question 4

The ___________ is the internal Exchange component responsible for managing switchovers and failovers and runs on every server in a DAG. IT detects failures of local resources and initiates failover
.

Answer 4

Active Manager

Question 5

____________ do not need to directly interact with the Active Manager in order to manage DAGs
.

Answer 5

Exchange admins

Question 6

__________ is important to ensure consistency, to act as a tie - breaker to avoid partitioning, and to ensure cluster responsiveness.

Answer 6

Quorum

Question 7

DAGs with an _____ number of members use the failover cluster’s Node and ____________ mode, which employs an external _________
that acts as a tie-breaker.

The ________ must be a member of Active Directory

Answer 7

even
File Share Majority quorum
witness server
witness server

Question 8

To maintain a ________ of voters (and therefore quorum ), at least ______ voters must be able to communicate with each other
.

Answer 8

majority

three

Question 9

_______ is the ability of the messaging system to survive the failure of a site and to continue functioning through the use of an alternate data center
.

Answer 9

Site resilience

Question 10

Typically, this scenario could be used to give the primary site voting nodes but a secondary site____________ to prevent losing quorum in the main site, and therefore not losing all of the Exchange enterprise. The main site would still need a majority of votes, of course.

Answer 10

Non-Voting Cluster Nodes

Question 11

A DAG leverages the failover clustering feature.

You can switch or failover a _________ between DAG servers. However, it is only active on one node at a time.

At any given time, a copy is either the ______or the __________, but not both.

A server may not host more than ___ copy of a given database.

Not all databases must have the same number of copies. In a 16-node DAG, one database can have 16 copies, while another database that is not redundant need contain only the one active copy.

Answer 11

single database
replication source or replication target
one

Question 12

A ______ occurs when an administrator intentionally coordinates moving the active database from one server to another.

Answer 12

switchover

Question 13

Create the database copies.

Set ______________- sets how long to wait before truncating committed transaction logs (deleting the transaction logs after copying to another (passive) database) - ___ days maximum.

Set ________ - sets how long to wait before the transaction logs are committed to the (passive) database copy - ___ days maximum.

Set _____________ - represents the activation preference order of a database copy after a failure or outage of the active copy.

Answer 13

truncation lag time 
7
replay lag time
14
preferred list sequence number

Question 14

A ____________ is one that is not updated by replaying transactions as they become available. Instead, the transaction logs are kept for a certain period and are then replayed.

Answer 14

lagged database copy

Question 15

High Availability Solutions for __________ role

Deploy multiple servers

Create a client access array configured with the same SSL certificate

Implement network load balancing

Deploy Client Access servers with similar hardware, memory, and performance

Answer 15

Client Access

Question 16

High Availability Solutions for __________ role

Deploy multiple servers

Implement multiple MX records or round- robin DNS for each Edge server

Answer 16

Edge Transport

Question 17

With ______________ , the message deletion from the transport
databases is delayed until the transport server verifies that all of the next hops for that message have completed delivery. If any of the next hops fail before reporting successful delivery, the transport server resubmits the message for delivery to that next hop.

By default, a _______ of a message is removed after _________

Answer 17

Shadow Redundancy
Shadow copy
two days