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33 Cards in this Set
- Front
- Back
LLM NR
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LLM NR is always used to resolve computer names on the local subnet for the
Network Map feature and for network browsing through Network on the Start menu |
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IPv6 multicast
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FF02:0:0:0:0:0:1:3
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IPv4 multicast
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224.0.0.252
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NetBIOS Node Types
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broadcast (b-node)
Point-to-point (p-node) mixed (m-node) hybrid (h-node) |
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server is authoritative
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A server is authoritative for a domain when that server relies on locally hosted database data (as opposed to merely cached information from other servers)
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DNS Zones
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A DNS zone is a contiguous portion of a namespace for which a server is authoritative
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DNS Resolvers
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A DNS resolver is a service that uses the DNS protocol to query for information from DNS servers. DNS resolvers communicate with either remote DNS servers or the DNS server
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Resource Records
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Resource records are DNS database entries that are used to answer DNS client queries. Each DNS server contains the resource records it needs to answer queries for its portion of the DNS
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recursion.
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Using this process, a DNS
server can query other DNS servers on behalf of the requesting client in order to resolve an FQDN. |
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If a computer needs to resolve a DNS name, what is the frst method it attempts to use?
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A computer frst checks the resolver cache to answer a query.
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When a DNS server receives a query, how does it frst attempt to resolve the name?
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A DNS server frst attempts to resolve a query by using resource records stored in a locally confgured zone.
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f a DNS server cannot resolve a query by using the frst method, which method
will it use next? |
If a DNS server cannot resolve a query by using zone data, it attempts to answer the query by using cached information.
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Recursion
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Recursion in DNS refers to the process of a DNS server querying other DNS servers on behalf of an original querying client.
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Iteration
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Iteration refers to the process of making repeated queries to different DNS servers to resolve a name.
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When would a DNS server contact a root server?
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A DNS server contacts a root server when it cannot answer a query with its own
cached or authoritative data. |
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If a DNS server contacts a root server to resolve the name www.contoso.com
and the root server cannot ans |
The root server responds to the DNS server with a referral for the address of the
DNS server authoritative for the .com domain. The DNS server then contacts this server for which it has received a referral. |
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The Hosts fle
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The Hosts fle helps resolve host names (essentially DNS names) to IP addresses
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Lmhosts fle
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the Lmhosts fle helps resolve NetBIOS names to IP addresses.
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clear the server cache at the command
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Dnscmd /clearcache
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A Time to Live (TTL) value applies to all cached resource
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3600 seconds (1 hour),
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What is the main function of Dcpromo?
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It is used to promote a server to a domain controller.
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If you want to install a DNS server on a stand-alone or member server running a Server Core
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start /w ocsetup DNS-Server-Core-Role
start /w ocsetup DNS-Server-Core-Role /uninstal l |
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Root Hints files
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WINDOWS\System32\Dns
\Cache.dns |
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DNS socket pooling
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randomizes the source
port from which DNS servers perform queries (pool 2500 ports) |
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socket
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(A socket is a combination of an address and port number
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You can adjust the size of the pool of ports
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dnscmd /Confg /socketPoolsize <value>
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If you need to exclude certain source ports from being used for DNS queries,
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dnscmd /Confg /socketPoolExcludedPortRanges <excluded port ranges>
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DNS cache locking
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helps prevent DNS server spoofing and cache poisoning
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To confgure DNS cache locking,
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dnscmd /Confg /CacheLockingPercent <percent>
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DNS Devolution Levels
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A devolution level is the number of tags left in a domain name to serve as a limit or stopping point for parent domain searching.
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attempt to force a registration in DNS
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Ipconfg /registerdns
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By default, does a client with a domain name assigned by DHCP (and not Active Directory membership) attempt to register its address in DNS?
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No
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To view the DNS client cache
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ipconfg /displaydns
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