Laura Kier
Submission for Errata
IT Essentials Fifth Edition
Page 321, Table 6-4, line 14, change “a secure” to “an unsecured” as indicated below.
***Begin table 6-4
Table 6-4 Common Network Protocols and Ports
Protocol
TCP/IP
Port
NA
NetBEUI/NetBIOS
137,139,150
HTTP
80
HTTP
443
FTP
20/21
SSH
22
Telnet
23
POP3
110
IMAP
143
SMTP
25
LDAP
389
SNMP
161
SMB
445
Description
A suite of protocols
used to transport data
on the internet
A small, fast protocol
designed for a
workgroup network that
requires no connection
to the Internet
A communication
protocol that
establishes a
request/response
connection on the
Internet
Uses authentication
and encryption to
secure data as it
travels between the
client and Web server.
Provides services for
file transfer and
manipulation
Securely connects to a
remote network device
Connects to a remote
network device
Downloads email
messages from an email
server
Downloads email
messages from an email
server
Sends email in a
TCP/IP network
Accesses information
directories
Manages and monitors
devices on a network
Provides shared access
SFTP
115
DNS
53
RDP
3389
***End table 6-4
***Please insert a worksheet icon here
to files, printers,
and communication
between points on a
network
Provides a secure an
unsecured file
transfer service
Resolves host names to
IP addresses
Used to provide access
to a remote computer