Network+ N10-007

32 flashcards · Computer Science · by asdf asdf

  1. SSH (Secure Shell) Port 22 A cryptographic network protocol for operating network services securely over an unsecured network. It was designed as a replacement for Telnet and for other unsecured remote shell protocols.

  2. DNS (Domain Name System) Port 53 The naming service used on the Internet and many TCP/IP-based networks.

  3. SMTP (Simple Mail Transfer Protocol) Port 25 A communications protocol that enables sending email from a client to a server or between servers.

  4. SFTP (Secure File Transfer Protocol) Port 22 A protocol available with the proprietary version of SSH that copies files between hosts securely. Like FTP, this protocol first establishes a connection with a host and then allows a remote user to browse directories, list files, and copy files. Unlike FTP, this protocol encrypts data before transmitting it.

  5. FTP (File Transfer Protocol) Ports 20 & 21 A protocol used to move files and folders over a network or the Internet.

  6. TFTP (Trivial File Transfer Protocol) Port 69 A simple version of FTP that uses UDP as the transport protocol, and does not require a logon to the remote host.

  7. TELNET Port 23 A network protocol that allows a user on one computer to log onto another computer that is part of the same network.

  8. DHCP (Dynamic Host Configuration Protocol) Port 67 & 68 A network service that provides automatic assignment of IP addresses and other TCP /IP configuration information

  9. HTTP (Hypertext Transfer Protocol) Port 80 The protocol used for transmitting web pages over the Internet

  10. HTTPS (Hypertext Transfer Protocol Secure) Port 443 The use of the Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering. This protocol encrypts and decrypts user page requests as well as the pages that are returned by the Web server

  11. SNMP (Simple Network Management Protocol) Port 161 An application layer (4) protocol used to exchange information between network devices

  12. RDP (Remote Desktop Protocol) Port 3389 A proprietary protocol developed by Microsoft, which provides a user with a graphical interface to connect to another computer over a network connection. The user employs client software for this purpose, while the other computer must run server software

  13. NTP (Network Time Protocol) Port 123 An Internet protocol that enables synchronization of computer clock times in a network of computers by exchanging time signals

  14. SIP (Session Initiation Protocol) Ports 5060 & 5061 A signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications

  15. SMB (Server Message Block) Port 445 A protocol that works on the application layer (7) and is used to share files, serial ports, printers, and communications devices, including mail slots and named pipes, between computers

  16. POP (Post Office Protocol) Port 110 A protocol for receiving email by downloading it to your computer from a mailbox on the server of an Internet service provider... SSL/TLS port

  17. IMAP (Internet Message Access Protocol) Port 143 Is a common protocol for retrieving email messages via the Internet

  18. LDAP (Lightweight Directory Access Protocol) Port 389 A communications protocol that defines how a client can access information, perform operations, and share directory data on a server

  19. LDAPS (Lightweight Directory Access Protocol Secure) Port 636 A client/server protocol used to access and manage directory information. It reads and edits directories over IP networks and runs directly over TCP/IP using simple string formats for data transfer

  20. H.323 Port 1720 A VoIP standard that handles the initiation, setup, and delivery of VoIP sessions

  21. ICMP (Internet Control Message Protocol) A core protocol in the TCP/IP suite that notifies the sender that something has gone wrong in the transmission process and that packets were not delivered.

  22. UDP (User Datagram Protocol) Is a connectionless protocol that does not require a connection to send a packet and does not guarantee that the packet arrives at its destination. A connectionless transport layer (4) protocol that is one of the protocols in the Internet protocol suite, and is used with IP. It is also known as the Universal Datagram Protocol

  23. TCP (Transmission Control Protocol) Part of the TCP/IP protocol suite, operates at transport layer (4) of the OSI seven-layer model. TCP is a connection oriented protocol

  24. IP (Internet Protocol) An agreed upon set of requirements for delivering packets across a network. The address for every computer or device on that network

  25. Connection oriented Describes the reliable nature of TCP. The connection refers to the 3-way handshake required in TCP before data transmission

  26. Connectionless No connection with the destination is established before sending data packets

  27. Layer 1 – Physical Defines hardware connections and turns binary into physical pulses (electrical or light). Cables operate at this layer

  28. Layer 2 – Data link Identifies devices on the Physical layer. MAC addresses are part of this layer. Switches operate at this layer.

  29. Layer 3 – Network Moves packets between computers on different networks. Routers operate at this layer. IP operates at this layer

  30. Layer 5 – Session Manages connections between machines. Sockets operate at this layer

  31. Layer 6 – Presentation Can also manage data encryption, hides the differences among various types of computer systems

  32. Layer 7 – Application Provides tools for programs to use to access the network (and the lower layers). HTTP, SSL/TLS, FTP, SMTP, DNS, DHCP, and IMAP are all examples of protocols that operate at this layer