Protocol Types
Connection-Oriented
- TCP based
- No data is lost during connection
- A formal connection setup and close
Examples
Connection-less
- UDP based
- Some data can be lost during connection without much of an issue
- No protocol to establish connection
Examples
Protocol Line
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Text Elements
20
21
tcp
tcp
FTP
22
tcp
SSH
SFTP
23
tcp
Telnet
25
tcp
SMTP
49
tcp
TACACS+
67
udp
68
udp
DHCP
...
TFTP
69
udp
80
tcp
HTTP
110
tcp
POP3
389
tcp
LDAP
HTTPS
443
tcp
445
tcp
SMB
1812
udp
1813
udp
RADIUS
143
tcp
IMAP4
993
tcp
IMAP4
(secure)
995
tcp
POP3
(secure)
465
tcp
SMTP
(secure)
587
tcp
SMTP
(secure)
3389
udp
RDP
5060
udp
VoIP
5004
udp
VoIP
SSL
TLS
137
udp
138
udp
139
tcp
NetBIOS
nbname
nbsession
53
tcp
DNS
a : … b : …
161
udp
SNMP
162
udp
queries
trap
data control
nbdata
Link to original
Protocol List
- Ethernet Protocol
- IP
- DHCP
- ARP
- TCP
- UDP
- HTTP
- HTTPS
- NDP
- PPP
- ICMP
- FTP
- TFTP
- SFTP
- SSH
- SMB
- NFS
- LDAP
- RADIUS
- TACACS+
- Kerberos
- NAT
- POP3
- IMAP
- SMTP
- Telnet
- RDP
- VoIP
- LDAP
- SMB
- L2TP
- IPsec
- SSL
- TLS
- VPN
- MIME
- PGP
- IPP
- LPD
- Syslog
- NetBT