DNS

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Author:
tntflashcards
ID:
287803
Filename:
DNS
Updated:
2014-11-01 13:46:08
Tags:
tntdns
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Description:
tnt dns
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  1. Name the 4 minimum DNS servers that will be involved in a resolution process?
    • 1. Resolving name server
    • 2. root name servers
    • 3. Top Level domain servers
    • 4. authoritative name servers
  2. When does DNS user tcp over udp
    • 1. Anything that is over 512b
    • 2. Zone Transfers
  3. DNS Forwarder
    A DNS server that instead of doing a recursive query, it forwards the info to another DNS server
  4. 3 DNS Zones
    • 1. Primary Zone- Full writable master copy of a DNS zone that contains all records, can be updated by admins for distribution to other servers
    • 2. Secondary Zone- Read-only complete copy of primary zone. updated by primary zone copy
    • 3. Stub Zone- A small read-only foot print of the primary zone, contains only "A-record" "NS Record" and "SOA Record". Updates from primary zone
  5. Domain records.
    • A - Ip Addresses
    • AAAA - IPv6 Addresses
    • MX - email servers
    • C-name - alias
    • D-name - true domain
    • SOA - zone serial # , admins email
    • TXT - Universal
    • NS - Name Server
    • SRV - Providing Hosts
    • SPF - List of known message transfer agents
  6. Glue Record
    Points from the registrars root to the Name server for the domain

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