Chapter 10 networkin
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| Which of the following are needed for e-mail clients to find their e-mail servers, FTP clients to find their file servers, and Web browsers to find Web servers? | B) DNS servers
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| What do DNS servers use to help resolve IP addresses to DNS names? | D) Reverse lookup zones
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| What do DNS servers use to help resolve DNS names to IP addresses? | D) Forward lookup zones
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| What type of DNS servers do not have any forward lookup zones and will resolve names of systems on the Internet for a network but are not responsible for telling other DNS servers the names of any clients? | A) Cache-only servers
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| What command gives you the IP address and the name of your system’s default DNS server? | B) nslookup
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| What file can be replaced when a network has a WINS server? | B) LMHOSTS
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| What file can be replaced when a network has a DNS server? | A) HOSTS
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| What does adding a WINS proxy agent enable you to accomplish on your network? | D) Cross a router
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| Folders with subfolders on a system, like domain names with subdomains, are said to have a structure resembling what? | C) Root
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| Which of the following commands clears the local cache of DNS entries? | C) ipconfig /flushdns
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| Which variation of the nbtstat command checks the current NetBIOS name cache? | B) nbtstat –c
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| Which of these terms are frequently used interchangeably? | E) Answers A and C
A) Domain
C) Subdomain
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| Which of the following are valid DNS record entry types? | E) Answers A, C, and D
A) A
C) NS
D) SOA
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| Which of the following is an example of a toplevel domain? | A) .com
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| How do authoritative DNS servers and cacheonly DNS servers differ? | B) Authoritative DNS servers store IP addresses and FQDNs of systems for a particular domain or domains whereas cache-only DNS servers do not store any FQDNs because they are only used to talk to other DNS servers to resolve IP addresses.
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| What do netstat and netstat -s do? | Netstat shows all the current connections on your system.
Netstat -s displays useful statistical information.
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| DNS is | a Hierarchical naming system for computers on a network. A DNS server resolves FQDNs to Ip addresses.
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| Name Resolution can be----- | accomplished through broadcasting by consulting the local hosts file or by contacting a DNS server.
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| Top level domains | handles what are known as the top-level domain names. Like .com, .net, gov, etc.
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| Second level DNS servers | handles the millions of names like totalsem.com and whitehouse.gov.
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| Within a simply network usually has one DNS server for the entire network. It has a single zone that list all the host names on the domain and their corresponding Ip addresses. | Authoritative DNS server or SOA
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| The ____ command is used to establish connectivity. | Ping
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