Network Services Flashcards
Dynamic Host Configuration Protocol (DHCP)
Assigns Devices with IP addresses and also provides them a subnet mask, default gateway, and DNS server
Domain Name System
Converts domain names to IP addresses using a hierarchical and decentralized system of naming
Zone Transfer
- Sharing of information between DNS servers about which domain names they have and their associated IP addresses
Network Time Protocol (NTP)
Synchronizes clocks between systems communicating over a packet-switched, variable-latency, data network
Scope
- A list of valid IP addresses for assignment or lease to a client computer or endpoint device on a given subnet
DHCP Relay
Forward DHCP packets between client and servers
IP Helper
Forwards several kinds of UDP broadcasts across the router and can be used in conjunction with the DHCP relay
Full-Qualified Domain Name (FQDN)
A domain name that is under a top-level provider
Uniform Resource Locator (URL)
Contains the FQDN with the method of accessing information
Zone Transfer
Sends DNS records from the primary nameserver to a secondary nameserver
Reverse DNS Lookup
Determines what the domain name is for a given IP address
Advanced Research Project Agency Network (ARPANet)
First top-level domain that was defined for what would become the internet
Forward Lookup
Uses DNS to find the IP address for a given domain name
Nameserver
- Type of DNS server that stores all the DNS records for a given domain
Internal DNS
Allows cloud instances on the same network access each other using internal DNS names
External DNS
Records created around the domain names from a central authority and used on the public internet
Time to Live (TTL)
Tells the DNS resolver how long to cache a query before requesting a new one
DNS Resolver/ DNS Cache
Makes a local copy of every DNS entry it resolves as you connect to websites
Recursive Lookup
DNS server communicates with several other DNS servers to hunt down the IP address and return to the client
Iterative Lookup
Each DNS server responds directly to the client with an address for another DNS server that may have the correct IP address
