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Flashcards

2110 Final flash cards

joshlamb92 English 62 cards

Cards in this deck (62)

  1. 1Backupmaking copies of data
  2. 2Archiveprimary copy of data
  3. 3Fault Toleranceassume a fault will not cause data loss
  4. 4Unstructuredeasy to implement, Disks or floppy disks
  5. 5Fulleverything is backed up
  6. 6Full + Incrementalfull backup + incremental = full + only files that have changed are backed up. Takes up lots of storage media.
  7. 7Full + differentialFull backup + partial backups = captures everything created or changed since full backup. Less media and time required.
  8. 8Mirror + reverse incremental.Mirror = reflects system state as of last backup and a history of reverse incrementals = each incremental backup is applied to mirror, then replaced files are saved in reverse incremental. Not suited to use removable data.
  9. 9Port 20FTP - Data Transfer
  10. 1021FTP - Control
  11. 1122ssh and other secure protocols
  12. 12Port 23telnet
  13. 13Port 25smtp
  14. 14Port 53dns
  15. 15Port 67dhcp server
  16. 16Port 68dhcp client
  17. 17Port 80http
  18. 18Port 110pop3
  19. 19Port 143Imap
  20. 20Port 161snmp
  21. 21Port 443https
  22. 22Port 5900-6VNC
  23. 23Port 8080http alternative
  24. 24Storage MediaMagnetic tape, hard drive, optical, floppy, solid state, remote service
  25. 25Manipulation of stored datacompression, de-duplication, duplication, encryption, staging
  26. 26HTTPcommunications protocol, W3 consortium and internet engineering task force developed. Does not require TCP or UDP can be implemented on any other protocol.
  27. 27Basic Response Codes1xx Informational
    2xx Success
    3xx Redirection
    4xx Client Error
    5xx Server Error
  28. 28100Continue server has received request headers
  29. 29200Ok, Successful
  30. 30403Forbidden, was a legal request but not authorized
  31. 31404Not Found. The desired result was not found
  32. 32What is LDAP?Lightweight Directory Access Protocol
    application protocol used for querying and modifying directory services, Running oer TCP/IP. Used for authentication.
  33. 33Mail ServicesSMTP, POP, IMAP
  34. 34SMTPSimple Mail Transfer Protocol. outbound mail 25. Replace by ESMTP simple text based protocol, client transmits an email message to the server. Push protocol, only sends.
  35. 35POPPost Office Protocol, for inbound mail, port 110. Assumes only one computer ever connects to the mailbox. application layer protocol. Receive mail when connected, view and manipulate without being connected. can request only newer mail.
  36. 36IMAPInterne Mail Access Protocol. For inbound mail port 143. Allows for simultaneous access. application layer protocol. supports both connected and not connected modes. generally leaves messages on server until user deletes them. allows users to access new messages instantly.
  37. 37Networked File System Distributed File SystemAny computer or file system that supports sharing files or other resources as persistent storage over a network. Works with clients, servers and storage devices. can be implemented as part of the OS or on software level. System with many autonomous clients and servers.
  38. 38Types of DFS/NFSNFS- For Unix systems
    AFS- Andrew File Systems
    SMB-Server Message Block
  39. 39SANStorage area network. Attach remote computer storage devices to servers. simplifying storage admin and adding flexibility. Eliminating cables and devices. Useful in media editing.
  40. 40NASNetwork attached storage and is a file level computer data storage connected to a computer network, providing both storage and file systems. NAS can reach performance limitations with too many users. NAS is limited by its own hardware- not up-gradable.
  41. 41Differences SAN/NASNAS offers file systems. SAN only allows block based storage. NAS is file level and SAN is block level. NAS uses TCP/IP and SAN uses Fibre. NAS uses TCP/IP and NFS/CIFS/HTTP. SAN uses Encapsulated SCSI.
  42. 42Similarities SAN/NASBoth are remote storage systems, shareable storage being achievable by both. Both can be accessed through VPN for security.
  43. 43TelnetTelecommunications Network. Uses TCP port 23. Not widely used due to eavesdropping. Use dropped due to security risks and favor of SSH. Used to diagnose problems manually or manually talk to other services. Used for online gaming.
  44. 44rloginRemote login. RCP and RSH released with UNIX systems in 1983. Port 513. rlogind. Allows for accounts to be shared across a network - academic or corporate apps. Allows for login without password when rlogind trusts a remote client.
  45. 45RSHRemote Shell. execute shell commands as another user, Port TCP 514. Communicates with a daemon on the remote host: rshd. NOT SECURE for network use. Send unencrypted info. Replaced by SSH
  46. 46RCPRemote Copy, not secure for network use
  47. 47SSHSecure Shell allows for transfer of data between 2 computers. It uses public key cryptography to authenticate the remote client. Supporting tunneling which is forwarding arbitrary TCP ports and x11 connections. Listens on port 22. Establishes a connection to a daemon: SSHd.
  48. 48Problems with SSHSSH-1 has inherent security problems, leading to MitM attacks. Modern services use SSH-2. Tunneling can also be a problem, allowing users to achieve passage to large volumes. Also can establish an entry point for unauthorized through SSH.
  49. 49SCPSecure alternative to rcp file transfers. Most often used in Unix systems. Can request passwords to make a connection (rcp fails at this). Can copy remote, local to remote, and remote to remote.
  50. 50SFTPA secure alternative to ftp. Uses TCP port 22. Allows for resuming interrupted transfers, directory listing, and remote file removal. GUIs can be implemented unlike SCP. Would use unsecure for gaming or apps that need speed. SFTP is secure and has the provision to upload with original date/time stamps
  51. 51SNMPSimple network management protocol uses network management, monitors conditions that warrant admin actions. Application layer protocol. Exposes management data.
  52. 52MIBsManagement Information bases. Contains the hierarchies describing each variable type and description.
  53. 53Types of Data managed by SNMPScaler - Defines a single object instance
    Tubular - Define multiple related object instances, grouped in MIB tables
  54. 54Data typesNetwork addresses, counters, gauges, time ticks, opaques, integers and unsigned integers.
  55. 55SPAMabuse of electronic messaging systems to send unsolicited bulk messages.
  56. 56Impact of SPAMUse up computer and network resources. Cost in human time and attention. Indirect costs include financial and identity theft, data or intellectual property theft, virus or other malware infection.
  57. 57Types of SPAMEmail, phone, search engine spam (SEO)
    SPAM came from a Monty Python flying circus episode.
  58. 58VNCVirtual Network Computing
    It is graphical desktop sharing system. Remote machine does all the work, with results sent to client. Ports 5900-6. Not by default secure. Password limit to 8 characters.
  59. 59RFB protocolRemote frame buffer. Simple protocol for remote access to graphical user interfaces, working at the frame buffer level. Clients and servers negotiate connection using best RFB for both.
  60. 60VPNVirtual Private Network it encodes to allow acting like a local resource. Operates at the WAN level. Communication network tunneled through another network and dedicated for a specific network. used for secure communications.
  61. 61TunnelingNetwork protocol that encapsulates a payload protocol. incompatible delivery network, secure path through an untrusted network. May use data encryption to transport, meaning protection over insecure protocols. Able to operate in a tunneling mode through a trusted security gateway. Use SSH.
  62. 62Web Serversresponsible for accepeting HTTP requests from clients. Must be quick. Number of requests per second, latency response time in milliseconds, and throughput in the bytes per second (the amount passing through the system or process). Accepts HTTP request from client.

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Flashcards on 2110 Final flash cards, created by joshlamb92 on 14/12/2015.
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joshlamb92
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