Computer Ports


COMPUTER PHYSICAL and LOGICAL PORTS

  Connector Devices Description

RJ45

10/100/1000Base T Networks Registered Jack-45, an eight wire connector use for networking
BNC/F 10Base2 or Cable Modem Bayonet Nut Connector use with RG58 coaxial cables or F port use with cable
RJ11 Telephone or Modem Connector Registered Jack-11 a four or six wire connector use for Internet connections
DIN/5 AT Keyboard Deutsche Industrinorm connector that is use to connect an AT keyboard
PS/2 ATX Keyboard or Mouse Personal System 2 connector or ATX connector developed by IBM to connect an ATX Keyboard (purple) or Mouse (green)
Centronics Parallel Printer end Connection A standard interface for connecting parallel printer devices
DB Connectors
Parallel Port Parallel Devices (Printer, Scanner, External Devices and Zip Drives)

Bi-Directional
ECP 8 bits wide 1.5Mbps-2.77Mbps
EPP 4 bits wide 600Kbps
LPT address

SCSI_50 SCSI Devices 3 rows use by External SCSI devices
SCSI_68 SCSI Devices 2 rows use by External SCSI devices
Analog Video Port or VGA Port Analog Monitor Port 3 rows with 15 holes use by CRT or LCD monitors found on video cards
Digital Video Interface Port Digital Monitor Port Digital Video Interface use by the newer LCD monitors found on newer graphics cards
display_port Display Port Display Port Display Port use for video
hdmi HDMI Port HD Signals Use by HDTV technology 1080 or 720 most common

MIDI Port
Joystick, Game and MIDI devices 2 rows 15 holes found on sound cards
Serial 9 Port Serial Mouse, PDA, Modem and Digital Camera

2 rows male 9 pins
1 bit wide transfer
57-115Kbps
Backwards compatibility
COM address

Serial 25 Port Serial Modem, Printers and Scanners

2 rows 25 pins
Obsolete

High Speed Connectors
USB_A USB_B USB Ports USB Devices (Keyboards, Mouse)

1. Hot Swappable

2. Speed
USB 1.0 1.5Mbps
USB 1.1 12Mbps
USB 2.0 up to 480Mbps
USB 3.0 up to 4.8Gbps

3. Daisy Chain
127 Devices

4 Pin

6 Pin

9 Pin

Firewire or IEEE 1394 Ports Firewire Devices
(High Speed Multimedia Devices Video Cam or iPOD devices)

1. Hot Swappable

2. Speed
IEEE1394_a 400Mbps
IEEE1394_b 800Mbps
IEEE 1394 1.61600
IEEE 1394 3.2 3200

3. Daisy Chain
63 Devices


ST

MTRJ
MTRJ

SC

LC
LC

Older
Fiber Optic Ports

Fiber Optic Connections

1. Immune to EMI

2. Very Fast

3. Can Travel great distances

Thunderbolt
aka LightPeak
High Speed Connection use by Apple to connect various devices Capable of speeds up to 10Gbps

Click here for the External connector quiz

PORTS

PORTS - In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network.

Some ports have numbers that are pre-assigned to them by the IANA (Internet Assigned Numbers Authority), and these are known as well-known ports (specified in RFC 1700).

Port numbers range from 0 to 65536, but only ports numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of well-known port numbers specifies the port used by the server process as its contact port.

WELL KNOWN PORT Numbers

15 Netstat
20/21 FTP
22 SSH
23 Telnet
25 SMTP
53 DNS
67/68 BOOTP
69 TFTP
79/49 TACACS+
80 HTTP
88 Kerberos
110 POP3
111 Port Map
119 NNTP
123 NTP
137-139 NetBIOS
143 IMAP
161 SNMP
389 LDAP
443 SSL
445 SMB
500 IPSec
520 RIP
546/547 DHCP
636 SLDAP
1512 WINS
1701 L2TP
1723 PPTP
1812/13 RADIUS
3389 RDP

 

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