Introduction to DNS.docx - Introduction to DNS 1 What is the role of DNS with domain names and IP addresses The Domain Name System(DNS is a system used

Introduction to DNS.docx - Introduction to DNS 1 What is...

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Introduction to DNS 1. What is the role of DNS with domain names and IP addresses? The Domain Name System ( DNS ) is a system used to convert a computer's host name into an IP address on the Internet. 2. What records are stored in a DNS name server? The most common types of records stored in the DNS database are for Start of Authority ( SOA ), IP addresses ( A and AAAA ), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS lookups (PTR), and domain name aliases (CNAME). Although not intended to be a general purpose database, DNS has been expanded over time to store records for other types of data for either automatic lookups, such as DNSSEC records, or for human queries such as responsible person (RP) records. As a general purpose database, the DNS has also been used in combating unsolicited email (spam) by storing a real-time blackhole list (RBL). The DNS database is traditionally stored in a structured text file, the zone file , but other database systems are common.
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Unformatted text preview: 3. How is the /etc/hosts file used in Linux? If there is no name server on the local network, it is still possible to establish a small table mapping IP addresses and machine hostnames in the /etc/hosts file, usually reserved for local network stations. The syntax of this file is very simple: each line indicates a specific IP address followed by the list of any associated names (the first being “completely qualified”, meaning it includes the domain name). 4. Briefly describe root nameservers and the DNS distributed database. 5. Name the file typically used in Linux/Unix to specify the nameserver. 6. Which part of the control panel is used by Windows to specify the nameserver? 7. Unlike whois the commands dig, host, and nslookup will return information about your sb.cis domain server. Why? 8. Which file specifies the mechanism and order of operation for name resolution....
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  • Spring '18
  • bruce kerry

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