Sec +

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Author:
WOBC1812
ID:
304990
Filename:
Sec +
Updated:
2015-07-08 23:01:11
Tags:
Security
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Description:
Sec + day two stuff.
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  1. What is the Open System Interconnection (OSI) model?
    • Application
    • Presentation
    • Session
    • Transport
    • Network
    • Data Link
    • Physical
    • (Every person seems to need data processing)
  2. In the OSI what is each level concerned with?
    • 7,6,5 - Data
    • 4. Segments
    • 3. Packets
    • 2. Frames
    • 1. Bits
  3. What is ICMP
    • Internet Control Message Protocol
    • Network Level 
    • Ping and Traceroute
  4. Fill in the blanks: 
    ______ well known ports
    ______ registered ports
    ______ dynamic
    • 0-1023
    • 1024-49124
    • 49152-65535
  5. What is a socket and a socket pair?
    • Socket: IP address and port number
    • Socket Pair: Client socket and server socket
  6. Fill in the blanks:
    A: _.0.0.0-___.255.255.255
    B: _.0.0.0-___.255.255.255
    C: _.0.0.0-___.255.255.255
    D. _.0.0.0-___.255.255.255 (____)
    E. _.0.0.0-___.255.255.255 (____)
    Loopback:___.x.x.x
    • A: 0 ; 127
    • B: 128 ; 191
    • C: 192 ; 223
    • D: 224 ; 239 (multicasting)
    • E: 240 ; 255 (experimental)
    • Loopback: 127.x.x.x
  7. What are some advantages to subnetting?
    • Decrease traffic
    • Broadcast to limited to individual subnets
    • faster to trace a problem
    • no wasted IP
    • customization
  8. What is CIDR
    Classless Inter-Domain Routing, this is subnetting expressed as 0.0.0.0/24
  9. Fill in the blanks:(Private networks)
    Class A: __.0.0.0 - __.255.255.255
    Class B: __.__.0.0 - __.__.255.255
    Class C: __.__.0.0 - __.__.255.255
    Auto IP: __.__.0.0 - __.__.255.255
    • A: 10 ; 10
    • B: 172.16 ; 172.31
    • C: 192.168 ; 192.168
    • Auto: 169.254 ; 169.254
  10. What is SMTP, Port number and use?
    Simple Mail Transfer Protocol ;Port 25 TCP ; Transmits mail from e-mail clients to e-mail servers and between email servers
  11. What is POP3, port and use?
    Post Office Protocol v.3 ; port 110 (TCP) ; downloads e-mail from an inbox on an e-mail server to an e-mail client
  12. What is IMAP4, port number and use?
    Internet Message Access Protocol v.4, TCP port 143, Downloads e-mail from an e-mail server to an e-mail client.
  13. What is FTP, port and use?
    File Transfer Protocol, TCP port 20 (active), 21 (passive); used to transfer files between systems on the internet.
  14. What is SFTP, what does it use and what port?
    Secure File Transfer Protocol ; uses Secure Shell SSH on port 22.
  15. What is FTPS, what does it use for security and what ports?
    • File Transfer Protocol Secure; uses SSL/TLS for security operates in two modes: 
    • FTPS: Implicit-port 989-990
    • FTPES: Explicit-port 443
  16. What is NetBIOS, uses and port?
    NetBIOS is a 15-character naming convention; uses port 137-139. 445
  17. What is DNS and port numbers?
    • Domain name Service; Translates domain names to IP addresses
    • Port: 53 
    • UDP used for queries
    • TCP used for zone transfers
  18. What is DNS Poisoning?
    Incorrect DNS data that is introduced into a primary DNS server; redirects traffic to incorrect site.
  19. What is Domain name kiting?
    Process of registering a domain name without paying
  20. What is RDP?
    Remote Desktop Protocol; allows a user to control a network computer; Port 3389
  21. What is a virtually dedicated connection between two systems or networks?
    Tunneling
  22. What is PPP?
    • Point-to-Point Protocol ; used for establishing remote connections over a serial line or dial-up connection. Allows TCP/IP traffic to be transmitted over telecommunications lines.
    • No encrption
    • EAP, CHAP or PAP authenticatoin
  23. What is L2F?
    • Layer 2 Forwarding
    • used for dial up
    • Authentication, but no data encryption
    • Operates at layer 2; UDP port 1701
  24. What is PPTP
    • Point-to-Point Tunneling Protocol
    • Encrypts PPP packets
    • after negotiation is completed; channel is encrypted; Uses MPPE to encrypt
    • Authentication: PAP, CHAP, MS-CHAP, EAP-TLS
    • Layer 2 TCP port 1723
  25. What is L2TP?
    • Hybrid PPTP and L2F
    • No data encryption
    • Uses IPSec 
    • Authentication: PAP, CHAP, MS-CHAP or EAP-TLS
    • Layer 2 and UDP 1701
  26. What is VPN
    Virtual Private Network: Private network connection over public network via tunneling protocol.
  27. What is the most widely used VPN?
    Internet Protocol Security (IPSec)
  28. What is NDP?
    Neighbor Discovery Protocol; uses ping on a fixed time to find adjacent networks.

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