CCNA Ch 15 Application Layer

¡Supera tus tareas y exámenes ahora con Quizwiz!

DNS, Some of these record types are as follows:

A - An end device IPv4 address NS - An authoritative name server AAAA - An end device IPv6 address (pronounced quad-A) MX - A mail exchange record

Session Layer

As the name implies, functions at the session layer create and maintain dialogs between source and destination applications.

Host config

BOOTP - Bootstrap Protocol DHCP - Dynamic Host Configuration Protocol

Common P2P Applications

BitTorrent Direct Connect eDonkey Freenet

Name system

DNS - TCP UDP 53

File Transfer

FTP - File Transfer Protocol TFTP - Trivial File Transfer Protocol

Presentation Layer

Formatting, or presenting, data at the source device into a compatible format for receipt by the destination device. Compressing data in a way that can be decompressed by the destination device. Encrypting data for transmission and decrypting data upon receipt.

Web

HTTP - Hypertext Transfer Protocol HTTPS - HTTP Secure

Application layer protocols

Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Trivial File Transfer Protocol (TFTP), Internet Message Access Protocol (IMAP), and Domain Name System (DNS) protocol.

Client-Server Model

In the client/server model, the device requesting the information is called a client and the device responding to the request is called a server. The client is a hardware/software combination that people use to directly access the resources that are stored on the server.

Peer-to-Peer Networks

In the peer-to-peer (P2P) networking model, the data is accessed from a peer device without the use of a dedicated server.

presentation layer formats data for the application layer, and it sets standards for file formats. Some well-known standards for video include

Matroska Video (MKV), Motion Picture Experts Group (MPG), and QuickTime Video (MOV) Some well-known graphic image formats are Graphics Interchange Format (GIF), Joint Photographic Experts Group (JPG), and Portable Network Graphics (PNG) format.

TCP/IP Application Layer Protocols

Name system Host config Email File Transfer Web

Gnutella

Peer-to-peer applications based on *THIS* protocol, people can make files on their hard disks available to others for downloading.

Email

SMTP - Simple Mail Transfer Protocol POP3 - Post Office Protocol IMAP - Internet Message Access Protocol

Here are three functions of SMB messages:

Start, authenticate, and terminate sessions. Control file and printer access. Allow an application to send or receive messages to or from another device.

DNS Hierarchy

The DNS protocol uses a hierarchical system to create a database to provide name resolution, as shown in the figure. DNS uses domain names to form the hierarchy.

Server Message Block

The Server Message Block (SMB) is a client/server file sharing protocol that describes the structure of shared network resources, such as directories, files, printers, and serial ports.

BitTorrent

file-sharing software that allows users to create "swarms" of data as they simultaneously download and upload "bits" of a given piece of content


Conjuntos de estudio relacionados

UNIDAD 1: LA ESTRUCTURA FAMILIAR EN ESPAÑA.

View Set