Post office protocol 3 pop3 110 pop3 is part of the

Info icon This preview shows pages 29–31. Sign up to view the full content.

Post Office Protocol 3 (POP3) 110 POP3 is part of the IP protocol suite and used to retrieve email from a remote server to a local client over an IP connection. With POP3, email messages are downloaded to the client. Remote Terminal Emulation (Telnet) 23 Telnet allows an attached computer to act as a dumb terminal, with data processing taking place on the IP host computer. It is still widely used to provide connectivity between dissimilar systems. Telnet can also be used to test a service by the use of HTTP commands. You should avoid using Telnet as it transmits all data (e.g., usernames and passwords) clear text. Secure Shell (SSH) 22 SSH allows for secure interactive control of remote systems. SSH is a much more secure alternative to Telnet.
Image of page 29

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Secure FTP (SFTP) 22 SFTP addresses one of the key weaknesses of FTP; namely, FTP doesn't use encryption. All data, including usernames and passwords, is sent clear text. SFTP provides the same functionality as FTP, but secures the data transmissions using the SSH protocol. Domain Name System (DNS) 53 DNS is a system that is distributed throughout the internetwork to provide address/name resolution. For example, the name would be identified with a specific IP address. Remote Desktop Protocol (RDP) 3389 RDP allows you to view and use the graphical desktop of a remote computer system as if you were sitting in front of it. Dynamic Host Configuration Protocol (DHCP) 67, 68 DHCP is used to dynamically assign IP addressing information to network hosts when they come online. The client system, when it connects to the network, broadcasts a DHCPDISCOVER message on the network, looking for a DHCP server. The DHCP server responds with a DHCPOFFER message containing proposed IP addressing configuration information. The client then responds with a DHCPREQUEST message to the DHCP server indicating it wants to use the proposed configuration. The DHCP server makes the assignment with a DHCPACK message. Lightweight Directory Access Protocol (LDAP) 389, 636 LDAP is a protocol used to access information about network resources stored by a directory service, such as Active Directory or eDirectory. LDAP uses port 389 for clear text transmissions and port 636 for secure transmissions. Simple Network Management Protocol (SNMP) 161, 162 SNMP is used to monitor and manage network devices. SNMP agents can be installed on network devices such as PCs, switches, and routers. These agents send data to an SNMP manager application running on an administrative workstation, which aggregates the information and displays an overview of the current network status. Thresholds can be configured which trigger alerts if exceeded. Server Message Block (SMB) 445 SMB enables the sharing of folders and printers on the network. Using SMB, remote users can access files in a shared folder on a server or workstation. Likewise, a remote user can send print jobs to a shared printer. SMB is also known as Common Internet File System (CIFS).
Image of page 30
Image of page 31
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '14
  • Computer network, Local area network, Network topology, Metropolitan area network

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern