4.7.11 The Domain Name System (DNS)
What is the difference between a forward lookup zone and a reverse lookup? (Select two.)
A reverse lookup finds the host name from a given IP address. A forward lookup finds the IP address for a given host name.
For each operation on the right, match the appropriate command from the list on the left.
Configure DNS server addresses for the router to use for resolving hostnames. ip name-server Create static entries for hosts that associate each hostname with an IP address. ip host Prevent the router from using DNS to resolve hostnames. no ip domain-lookup Set the DNS name used by the router. hostname
Listed below are several places that a workstation checks to resolve DNS hostnames. A. Primary DNS server B. Secondary DNS servers C. HOSTS file D. Local DNS cache In a browser, you type the name of a website. In which order will these locations be checked during the name resolution process?
D, C, A, B
You want to implement a protocol on your network that allows computers to find the IP address of a host from a logical name. Which protocol should you implement?
DNS
You are setting up a new branch office for your company. You would like to implement solutions to provide the following services: Hosts should be able to contact other hosts using names such as server1.westsim.com. IP address assignment should be centrally managed. Which services should you implement on your network to meet the requirements? (Select two.)
DNS DHCP
Which of the following services automatically creates and deletes DNS host records when an IP address lease is created or released?
Dynamic DNS
Match the DNS components on the left with its function on the right.
Managed by the Internet Corporation of Assigned Names and Numbers (ICANN). Top-level domain Includes the host name and all domain names separated by periods. Fully qualified domain name The part of a domain name that represents a specific host. Hostname Has a complete copy of all the records for a particular domain. Authoritative server The last part of a domain name. Top-level domain Denotes a fully qualified, unambiguous domain name. . (dot) domain
You have a workstation configured with DNS server addresses as follows: Primary DNS server = 192.168.1.1 Alternate DNS server = 192.168.1.155 While browsing the internet, you go to www.cisco.com. A few minutes later, you type ping www.cisco.com into a command prompt. How will the workstation get the IP address for www.cisco.com?
Out of its local DNS cache
Listed below are several DNS record types. Match the record type on the left with its function on the right.
Points a hostname to an IPv4 address. A Provides alternate names to hosts that already have a host record. CNAME Points an IP address to a hostname. PTR Points a hostname to an IPv6 address. AAAA Identifies servers that can be used to deliver mail. MX
If dynamic DNS is being used, which of the following events will cause a dynamic update of the host records? (Select two.)
The ipconfig /registerdns command is entered on a workstation. The DHCP server renews an IP address lease.
