Q&A

Q1:	What is a domain name?
A1:	It is a name that is administered by a central authority to ensure the name's uniqueness. The first part of the name identifies or is related to a company or organization. The second portion of a domain name is a suffix such as .com, .gov, or .edu that provides a means of classification.
Q2:	What is a hostname?
A2:	It is a single name that is assigned to a particular host. Usually the hostname has some meaning such as location, usage, or ownership.
Q3:	What is an FQDN?
A3:	A combination of a hostname concatenated to a domain name by the addition of a dot character. For example, a hostname bigserver and a domain name mycompany.com when combined become the FQDN bigserver.mycompany.com.
Q4:	What are DNS resource records?
A4:	Resource records are the entries contained in a DNS zone file. Different resource records are used to identify different types of computers or services.
Q5:	What type of resource record is used for an alias? Why are aliases used?
A5:	CNAME; it is used to represent the real name of a computer on a network.
Q6:	What is a caching-only server?
A6:	A caching-only server responds to queries from clients on the local network for name resolution requests and stores that information in its cache in case a request for that information is made again. Caching-only servers are not registered as DNS servers, so other DNS servers don't know about them and therefore won't query them.
Q7:	What is the role of a resolver?
A7:	A resolver passes name resolution requests between the applications on a system and DNS servers.
Q8:	How do you centrally administer entries in an LMHosts file?
A8:	You can implement centralized administration by adding several lines to the LMHosts files found on each local computer. A line that starts with #INCLUDE and contains a UNC name of an LMHosts file located on a server provides a link to the central file.
Q9:	How can you create static NetBIOS entries in the NetBIOS name cache?
A9:	By using the keyword #PRE on the line of the desired entry in an LMHosts file.