DHCP Overview
Define DHTP
Dynamic Host Configuring Protocol
What is grouping of IP addresses called?
Pool
Define DNS?
Domain Name System
What is RR and what does it do?
RR is Resource Records and it is the database records of domain name services.
What does NTP server do?
- Listens on udp/123, records to time requests from NTP clients.
- Does not modify their own time.
What does Limited Communication range use?
It uses the IPv4 broadcast domain
What is Scope?
A single contigous pool of IP addresses.
What is Internal DNS managed by?
Internal DNS is managed by internal servers.
What are over 30 record types?
IP addresses, certificates, host alias names, etc,.
What does NTP client do?
Requests time updates from NTP server.
Why is Scalability always an issue?
May not want (or need) to manage DHCP servers at every remote location.
What does Dynamic Assignment mean?
It means that the DHCP server has a big pool of addresses to give out.
What is External DNS managed by?
External DNS is managed by a third-party.
AAAA records are for?
IPv6 addresses
What does NTP client/server do?
- Requests time updates from an NTP server.
- Responds to time requestsfrom other NTP clients.
Define BOOTP?
Bootstrap Protocol
What is Automatic Assignment?
DHCP server keeps a list of past assignments and the same IP address will be assigned over and over again.
What is Forward Lookup?
- Provides the DNS with an FQDN.
- DNS servers provide an IP address.
What does SPF Protocol do?
- Prevent mail spoofing
- Mail servers check that incoming mail really did come from an authorized host.
Name 2 stratum layers.
Stratum 0, 1, 2
What was the problem with BOOTP?
BOOTP didn't automatically define everything. Some manual configuration were still required.
What is leasing your address?
It is a temporary IP address but can be renewed at the end of the lease time.
What is Reserve DNS?
- Provide the DNS server with an IP address.
- The DNS server provides an FQDN.
What does SPF stand for?
Sender Policy Framework
Explain Stratum 1.
- Synchronized to stratum 0 servers.
- Primary time servers.