Application, Transport, Internet, and Network Access layer protocols

Application, Transport, Internet, and Network Access layer protocols for Cisco CyOps Associate

DNS

Application layer protocol that translates domain names into IP addresses.

DHCPv4

Application layer protocol that dynamically assigns IPv4 addressing information to DHCPv4 clients at start-up and allows the addresses to be re-used when no longer needed.

DHCPv6

Application layer protocol that dynamically assigns IPv6 addressing information to DHCPv6 clients at start-up.

SLAAC

Application layer protocol that allows a device to obtain its IPv6 addressing information without using a DHCPv6 server.

SMTP

Application layer protocol that enables clients to send email to a mail server and enables servers to send email to other servers.

POP3

Application layer protocol that enables clients to retrieve email from a mail server and download the email to the client's local mail application.

IMAP

Application layer protocol that enables clients to access email stored on a mail server as well as maintaining email on the server.

FTP

Application layer protocol that sets the rules that enable a user on one host to access and transfer files to and from another host over a network.

SFTP

Application layer protocol that can be used to establish a secure file transfer session in which the file transfer is encrypted.

TFTP

Application layer protocol that is a simple, connectionless file transfer protocol with best-effort, unacknowledged file delivery.

HTTP

Application layer protocol that is a set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the World Wide Web.

HTTPS

Application layer protocol that encrypts the data that is exchanged over the World Wide Web.

REST

Application layer protocol that is a web service that uses application programming interfaces (APIs) and HTTP requests to create web applications.

TCP

Transport layer protocol that enables reliable communication between processes running on separate hosts and provides reliable, acknowledged transmissions that confirm successful delivery.

UDP

Transport layer protocol that enables a process running on one host to send packets to a process running on another host but does not confirm successful datagram transmission.

IPv4

Internet layer protocol that receives message segments from the transport layer, packages messages into packets, and addresses packets for end-to-end delivery over a network and uses a 32-bit address.

IPv6

Internet layer protocol that is similar to IPv4 but uses a 128-bit address.

NAT

Internet layer protocol that translates IPv4 addresses from a private network into globally unique public IPv4 addresses.

ICMPv4

Internet layer protocol that provides feedback from a destination host to a source host about errors in packet delivery for IPv4.

ICMPv6

Internet layer protocol that has a similar functionality to ICMPv4 but is used for IPv6 packets.

ICMPv6 ND

Internet layer protocol that includes four protocol messages that are used for address resolution and duplicate address detection.

OSPF

Internet layer protocol that is a Link-state routing protocol that uses a hierarchical design based on areas. Is also an open-standard interior routing protocol.

EIGRP

Internet layer protocol that is an open standard routing protocol developed by Cisco that uses a composite metric based on bandwidth, delay, load and reliability.

BGP

Internet layer protocol that is an open standard exterior gateway routing protocol used between Internet Service Providers (ISPs).

ARP

Network Access layer protocol that provides dynamic address mapping between an IPv4 address and a hardware address.

Ethernet

Network Access layer protocol that defines the rules for wiring and signaling standards of the network access layer.

WLAN

Network Access layer protocol that defines the rules for wireless signaling across the 2.4 GHz and 5 GHz radio frequencies.