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3. What is the function of round robin Which feature takes priority, round robin or netmask ordering
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Round robin rotates the order of matching resource records in the response list returned to DNS clients. Each successive DNS client that queries for a multihomed name gets a different resource record at the top of the list. Round robin is secondary to subnet prioritization. When the Enable Netmask Ordering check box is also selected, round robin is used as a secondary means to order returned resource records for multihomed names.
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4. You are the chief network administrator for the Proseware company network, which has four branch offices. Each branch office has its own LAN, which is con nected to the Internet using a T1 line. Through virtual private network (VPN) con nectivity over the Internet, a single intranet is maintained and replicated over Web servers at each branch office. The four Web servers have unique IP addresses but share a single FQDN, intranet.proseware.com, as shown in Figure 5-38.
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intranet.proseware.com 192.168.15.1/20
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intranet.proseware.com 192.168.30.2/20
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intranet.proseware.com 192.168.42.40/20
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intranet.proseware.com 192.168.50.100/20
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Figure 5-38
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Proseware intranet servers
Within the Proseware network, a DNS client computer with the IP address 192.168.33.5 submits a query to a DNS server for the name intranet.proseware.com. Assuming that the Netmask Ordering option is enabled on the DNS server, which IP address is returned to the DNS client (Hint: Determine which of the four Web servers shares the same subnet ID as that of the querying client computer.)
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5
Implementing a DNS Infrastructure
Lesson 4, Practice, Exercise 3
Page 5-61
12. Use the DNS console to answer the following question: how many host (A) resource records does Computer1 hold for the sub.domain1.local domain
None
Lesson 4 Review
Page 5-62
1. You are designing the DNS namespace for a company named Proseware, which has a registered domain name of proseware.com. Proseware has a central office in Rochester and one branch office each in Buffalo and Syracuse. Each office has a separate LAN and network administrator. You want to configure a single DNS server at each location, and you want the central office to host the proseware.com domain. In addition, you want the administrators in Buffalo and Syracuse to main tain responsibility for DNS names and name resolution within their networks. Which of the following steps should you take a. Configure a standard primary server in Rochester to host the proseware.com zone. Delegate a subdomain to each of the branch offices. Configure a sec ondary server in both Buffalo and Syracuse to host each of the delegated subdomains. b. Configure a standard primary server in Rochester to host the proseware.com zone. Configure a secondary server in both Buffalo and Syracuse to improve performance and fault tolerance to the zone. c. Configure the DNS server in Rochester to host a standard primary zone for the proseware.com domain. Configure the DNS servers in both Buffalo and Syra cuse to each host a standard primary zone for a subdomain of proseware.com. Create a delegation from the DNS server in Rochester to each of these subdomains. d. Configure the DNS server in Rochester to host a standard primary zone for the proseware.com domain. Configure the DNS servers in both Buffalo and Syra cuse to host a standard primary zone for a subdomain of proseware.com. Add secondary zones on each DNS server to pull transfers from the primary zones hosted on the other two DNS servers.
Questions and Answers
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2. You are the administrator for your company s network, which consists of a central office LAN and three branch office LANs, all in different cities. You have decided to design a new DNS infrastructure while deploying Active Directory on your network. Your goals for the network are first to implement a single Active Directory forest across all four locations and second to minimize response times for users connecting to resources anywhere on the network. Assume that all branch offices have domain controllers running DNS servers. Which of the following actions best meets these goals a. Configure a single Active Directory domain for all four locations and config ure a single Active Directory integrated DNS zone that replicates through the entire domain. b. Configure a single Active Directory domain for all four locations, and config ure a standard primary zone at the central office with zone transfers to sec ondary zones at each branch office. c. Configure an Active Directory domain and a DNS domain for the central office, delegate a DNS subdomain to each branch office, and configure an Active Directory integrated zone in each location that replicates through the entire forest. d. Configure an Active Directory domain and a DNS domain for the central office, delegate a DNS subdomain to each branch office, and configure an Active Directory integrated zone in each location that replicates through the entire domain.
3. Which resource records are added to a parent zone to delegate a given subdo main What are the specific functions of these records
An NS resource record and an A resource record are created in the delegated subdomain on the parent zone. The NS resource record directs queries to the DNS server, specified by name, that is authoritative for the delegated zone. The A resource record, called a glue record, allows the computer name specified in the NS resource record to be mapped to an IP address.
4. The DNS server NS1 hosts the zone lucernepublishing.com and is configured to forward all queries for which the server is not authoritative. NS1 receives a query for sub.lucernepublishing.com, a delegated subdomain. Where will the query be directed
The query will be directed to the server authoritative for the sub.lucernepublishing.com zone, not to the configured forwarder.
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