protocols and ports Flashcards
port 21 is control port and port 20 transfers files, TCP
file transfer protocol (FTP)
designed to transmit data through a remote connection, TCP
SSH, 22
uses SSH to encrypt file transfers, TCP
SSH File transfer protocol, 22
Cisco proprietary protocol used for authentication, authorization and accounting (AAA) services
TACAS+, 49
used to associate IP addresses with domain names. uses both UDP and TCP
Domain name System (DNS), 53
uses TCP port 53 for zone transfers and UDP for name services lookups
network management protocol used to assign local IP addresses to devices on a network. used to create multiple private IP addresses from the one public IPv4 address
dynamic host configuration protocol (DHCP), 67/68
TCP port used for websites and most internet
http, 80
network authentication protocol allows for comm over a non secure network. probably microsoft network, and port
kerberos, 88
email protocol allows email clients to comm with email servers. provides only 1 way communication, and port
post office protocol (POP), 110
email protocol used by email clients to comm with email servers. provides 2 way comm, TCP
Internet message access protocol (IMAP), 143, 993
used to monitor and manage network devices on IP networks
simple network management protocol (SNMP 161)/162 (SNMP Trap)
used to manage and comm with directories
lightweight directory access protocol (LDAP), 389
secure version of HTTP uses TLS for encryption. TCP
HTTPS, 443
secure version of LDAP uses TLS for encryption
LDAPS, 636
uses TLS for encryption. can run on ports 20/21 but sometimes allocated ports 989/990
file transfer protocol secure (FTPS)
secure version of IMAP, uses TLS for encryption
internet message access protocol secure (IMAPS), 993
secure version of POP using TLS, uses TCP
post office protocol 3 secure (POP3S), 995
used to provide AAA for network services
remote authentication dial in user service (RADIUS), 1812, 1813
developed as an upgrade to radius
diameter, 3868
replaced RTP, used to stream audio and video comm using UDP
secure real time protocol (SRTP), 5004
Used to create point to point connections, like VPNs over a UDP connection. Needs IPSec for encryption. Designed as an extension to PPTP. Operates at the data link layer but encapsulates packets at the session layer.
layer 2 tunneling protocol (L2TP), 1701
one of 2 main protocols of internet protocol (IP) suite used to transmit data over an IP network. provides error checking to ensure packets are not lost in transit
layer 4 transport
transmission control protocol (TCP)
2nd main protocol in the IP suite that transmits datagrams in a best effort method. does not include error checking
user datagram protocol (UDP)
based on PPP. deprecated protocol for VPNs
point to point tunneling protocol (PPTP), 1723
