A+ chapter 23 902

Simple Network Management Protocol (SNMP)

A TCP/IP protocol that exchanges management information between networked devices. It allows network administrators to remotely monitor, manage, and configure devices on the network.

Secure Shell (SSH)

A UNIX-based command interface and protocol for securely accessing a remote computer, via the terminal / command prompt. SSH uses port 22. Data is encrypted.

Remote desktop connection

A Windows feature that allows a computer to be set up for remote access over an Internet connection. type mstsc in search bar.

Latency

_____ is the amount of time a packet takes to get to its destination and is measured in milliseconds.

Web servers

______ are servers running specialized software. They provide web sites that you access by using the HTTP protocol on port 80.

telnet

______ is a terminal emulation program for TCP/IP networks that uses port 23 and enables you to connect to a server or fancy router and run commands on that machine as if you were in front of it. It does send passwords as clear text, so it really should only be used on your LAN.

tunneling

a process that encrypts each data packet to be sent and places each encrypted packet inside another packet.

exam tip

exam tip. Most e-mail servers have traditionally used Secure Sockets Layer (SSL) encryption for extra security, though Transport Layer Security (TLS) is becoming more and more popular due to its increased security. Every major e-mail client will have a setting called Connection security, or Security, or something like that. If your e-mail server uses encryption, change this setting to SSL and check the port setting.

exam tip

exam tip. While Apple sells a Remote Desktop product marketed to business customers that includes remote assistance features, Mac OS X also screen sharing has more modest built in to the operating system. This built-in functionality, which can be enabled in System Preferences, should suffice for general remote access, collaboration, and light remote troubleshooting.

proxy server

A _______ is software that enables multiple connections to the internet to go through one protected computer. Applications that want to access Internet resources send requests to the proxy server instead of trying to access the Internet directly, which both protects the client computers and enables the network administrator to monitor and restrict Internet access.

File transfer protocol (FTP)

A communications method for transferring data between computers on the Internet. It uses ports 20 and 21.

virtual network computing (VNC)

A program that allows you to control a computer at a remote location.

Remote Desktop Protocol (RDP)

A protocol that allows for separate channels for carrying presentation data, serial device communication, licensing information, and highly encrypted data (keyboard, mouse activity).

Point to point Tunneling Protocol (PPTP)

A protocol that works with PPP to provide a secure data link between computers using encryption.

Server Message Block (SMB)

A protocol used by Windows to share files and printers on a network.

Lightweight Directory Access Protocol (LDAP)

A protocol used by various client applications when the application needs to query a database.

Exam tip

Exam tip. Make sure you know your port numbers for these e-mail protocols! POP3 uses port 110, IMAP uses port 143, and SMTP uses port 25.

Exam tip

Exam tip. Over the years, Microsoft has introduced several versions (what Microsoft calls dialects) of SMB, and one of the more widespread dialects Common Internet File System (CIFS). is CIFS is currently deprecated but still widely supported, making knowledge of it important for passing the CompTIA A+ 902 exam.

Apple Filing Protocol (AFP)

Protocol developed by Apple to facilitate file transfers between computers. It is no longer the default protocol used by Mac OS X.

Virtual Private Network (VPN)

Standards have been created that use encrypted tunnels between a computer (or a remote network) to create a private network through the internet.

integrated commercial provider email configuration

The name for the integrated, fully configured email client for a mobile device.