Networking questions in Alphabetical Order

APIPA - The range of Automatic Private IP Address is
169.254.0.1 to 169.254.255.254

COPY - To copy a folder from one Linux machine to another Linux machine

scp -r /home//Desktop root@:/root/Desktop.

DNS RECORDS -
A record : If a user wants to get the ip address of a host , he uses forward lookup zone to get the same. It contains ip addresses corresponding to its host names.

PTR record :

IMAP

IP ADDRESS - 3 classes of IP Address

Class A - 0 to 127
Class B - 128 to 191
Class C - 192 to 223

IPv4 & IPv6 ( Read the difference )

ISP also study this ISP in Wiki

Networking Components & their Uses

Networking Questions & Answers

PORT NUMBER - Important port numbers.

DNS - 53
DHCP - 68
TELNET - 23
FTP - 21
IMAP - 143
POP - 110
HTTP - 80
HTTPS - 443
SMTP - 25

Printers

PRIVATE IP ADDRESS - The range of Private IP address is
10.0.00 to 10.255.255.255
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255

REGEDIT - To disable USB in Registry
1) Go to Run
2) Type regedit
3) Expand HKEY Local Machine.
4) Expand System
5) Expand Current Control
6) Expand Services
7) Expand USB
8) Click Start from the right side screen
9) Change the value to 4 ( Thus disabled) [ To enable the value is 3 ]

SMTP

Volume Shadow Copy