Month: October 2018

NONAP – Nonlinear Adaptive Processor

NONAP stands for Nonlinear Adaptive Processor.

NONAP suppresses interference in direct-sequence spread-spectrum communications receive systems. It accomplishes this by optimizing the detection process dynamically against the current received interference.

The characteristics of interference are estimated statistically and then, using this information, are used to derive a nonlinear transform
to apply to the combination of signal and noise. As the statistical characteristics of the interference change, the resulting transformations change to match. Large improvements (tens of dB) can be achieved for a wide range of interference modulations.

For more information see J. H. Higbie’s paper, ADAPTIVE NONLINEAR SUPPRESSION OF INTERFERENCE, presented at MILCOM 88.

Network Protocols Port Numbers for Security+

Here are some of the common network protocols covered by the Security+ exam, along with their port numbers:

File Transfer Protocols

Name Definition TCP UDP Port Number
FTP File Transport Protocol X 20, 21
SSH Secure Shell X 22
SFTP Secure File Transport Protocol (uses SSH) X 22
SCP Secure Copy (uses SSH) X 22
TFTP Trivial File Transport Protocol X 69
FTPS File Transport Protocol Secure (uses SSL) X 443

Email Protocols

Name Definition TCP UDP Port Number
SMTP File Transport Protocol X 20, 21
POP3 Secure Shell X 22
IMAP4 Secure File Transport Protocol (uses SSH) X 22

Remote Access

Name Definition TCP UDP Port Number
Telnet Telnet X 23
TACACS Terminal Access Controller Access-Control System X 49
TACACS+ Terminal Access Controller Access-Control System+ X 49
SSL VPN SSL VPN – Secure Sockets Layer virtual private network X 443
ISAKMP (VPN) Internet Security Association and Key Management Protocol (virtual private network) X 500
L2TP Layer 2 Tunneling Protocol X 1701
PPTP Point-to-Point Tunneling Protocol X X 1723
RDP Remote Desktop Protocol X X 3389

Other Protocols

Name Definition TCP UDP Port Number
DNS Domain Name System X X 53
DHCP Dynamic Host Configuration Protocol X 67, 68
HTTP Hypertext Transfer Protocol X 80
HTTPS Hypertext Transfer Protocol Secure X 443
Kerberos Kerberos X X 88
NNTP Network News Transfer Protocol X 119
SNMP Simple Network Management Protocol X 161
SNMP Trap Simple Network Management Protocol Trap X X 162
LDAP Lightweight Directory Access Protocol X X 389
Syslog Syslog X 514

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