Your network contains a single Active Directory domain named contoso.com. The domain
contains a domain controller named DC1 that hosts the primary DNS zone for contoso.com.
All servers dynamically register their host names.
You install three new Web servers that host identical copies of your company’s intranet
website. The servers are configured as shown in the following table.
You need to use DNS records to load balance name resolution queries for
intranet.contoso.com between the three Web servers.
What is the minimum number of DNS records that you should create manually?
A.
1
B.
3
C.
4
D.
6
Explanation:
To create DNS Host (A) Records for all internal pool servers
1. Click Stabrt, click All Programs, click Administrative Tools, and then click DNS.
2. In DNS Manager, click the DNS Server that manages your records to expand it.
3. Click Forward Lookup Zones to expand it.
4. Right-click the DNS domain that you need to add records to, and then click New Host (A or AAAA).
5. In the Name box, type the name of the host record (the domain name will be automatically appended).
6. In the IP Address box, type the IP address of the individual Front End Server and then
select Create associated pointer (PTR) record or Allow any authenticated user to update
DNS records with the same owner name, if applicable.
7. Continue creating records for all member Front End Servers that will participate in DNS Load Balancing.
For example, if you had a pool named pool1.contoso.com and three Front End Servers, you
would create the following DNS entries:
http: //technet. microsoft. com/en-us/library/cc772506. aspx
http: //technet. microsoft. com/en-us/library/gg398251 . aspx
Shouldnt the answer be 4 entries as you would need to create 3 new host A entries and a CNAME entry.
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I don’t think so. It said they’re dynamically added.
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It is B, because “the minimum number of DNS records that you should create manually” is the following 3:
1) Add a new Host (A) WEBl.contoso.com pointing to IP: 10.0.0.21 (that is WEB2)
2) Add a new Host (A) WEBl.contoso.com pointing to IP: 10.0.0.22 (that is WEB3)
3) Add a new alias (CNAME) “intranet.contoso.com” pointing to FQDN “WEBl.contoso.com”
Remember that is the minimum number of DNS records! not the cleanest one, so you will mantain the web1 name so you only have to add a new one.
In a cleaning procedure, you will create 3 host(A) and 1 alias(CNAME)records. Example:
WEB.contoso.com -> IP: 10.0.0.20
WEB.contoso.com -> IP: 10.0.0.21
WEB.contoso.com -> IP: 10.0.0.22
intranet.contoso.com -> WEB.contoso.com
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no you dont create a A record for WEB2/3 to point to WEB1.contoso.com. As that’s the “true” hostname.
just 3 new A records with intranet.contoso.com. Answer remains the same as you just need to create 3 A records.
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we need 3 A record for each server
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All of the web servers dynamically register their host names in DNS. You want to DNS load balance “intranet.contoso.com”, so you only have to create THREE (3) new HOST records (TOTAL) for “intranet.contoso.com”, pointing to each of the 3 different IP addresses of your identical WEB1, WEB2,Web3 IIS servers.
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It’s easier and more correct just to create 3 CNAME entries intranet.contoso.com for web1,web2 and web3. Anyway, the answer is B
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