NET140 chp3 set4

the authority on computer names and their IP addresses for computers in their domains.

• Domain Name System (DNS)

• Authoritative Name Server

• Dynamic Host Configuration Protocol (DHCP)

• Internet Protocol Address (IPA)

an application layer addressing scheme that identifies where to find a particular resource on a network or across networks.

• URL (uniform resource locator)

• IP Address

• HTTP (Hypertext Transfer Protocol)

• FTP (File Transfer Protocol)

the authoritative name server for an organization, which holds the authoritative DNS database for the organization’s zones. This server is contacted by clients, both local and over the Internet, to resolve the DNS queries for the organization’s domains.

• Primary DNS Server

• Secondary DNS Server

• Caching DNS Server

• Forwarding DNS Server

a simple application layer protocol in the TCP/IP suite used to synchronize the clocks of computers on a network.

• NTP (network time protocol)

• HTTP (Hypertext Transfer Protocol)

• FTP (File Transfer Protocol)

• SMTP (Simple Mail Transfer Protocol)

a standard that uses TLS (transport layer security) to encrypt the NTPv4 (network time protocol version 4) communications.

• NTS (network time security)

• HTTPS (Hypertext Transfer Protocol Secure)

• SSH (Secure Shell)

• IPsec (Internet Protocol Security)

the process of discovering the IP address of a host when the FQDN (fully qualified domain name) is known.

• Name Resolution

• Domain Lookup

• IP Discovery

• Host Identification

the process of updating a secondary DNS server with information from the primary DNS server’s database.

• Zone Transfer

• DNS Propagation

• IP Address Allocation

• Domain Registration

a TCP/IP application layer protocol that is seldom used by humans. Network devices, such as routers and switches, commonly use it as they are booting up to request configuration files from a TFTP server on the local network. Unlike FTP, TFTP relies on UDP at the transport layer using port 69.

• TFTP (trivial file transfer protocol)

• FTP (file transfer protocol)

• HTTP (hypertext transfer protocol)

• SMTP (simple mail transfer protocol)

a DNS server maintained by ICANN and IANA that is an authority on how to contact the top-level domains, such as those ending with .com, .edu, .net, .us, and so on.

• Root DNS server

• Secondary DNS server

• Caching DNS server

• Forwarding DNS server

a number that indicates an NTP (network time protocol) server’s location within the NTP hierarchy relative to a stratum-1 server.

• Stratum

• Layer

• Level

• Rank