Firewall
A system designed to prevent unauthorized access to or from a private network.
Firewalls can be implemented in both hardware and software, or a combination
of both. Firewalls are frequently used to prevent unauthorized Internet users
from accessing private networks connected to the Internet, especially intranets.
All messages entering or leaving the intranet pass through the firewall, which
examines each message and blocks those that do not meet the specified
security criteria.
Gateway
A device, usually a Router, that connects hosts on a local network to other
networks.
IP Address
Every PC on the Internet has a unique identifying number, called an IP Address.
A typical IP address looks like this: 216.27.61.137
IPSec
IPSec stands for IP Security. It provides authentication and encryption over the
Internet. It functions at Layer 3 and thus secures everything on the network. It
has become a standard protocol used for virtual private networks (VPNs).
MAC Address
On a local area network (LAN) or other network, the MAC (Media Access
Control) address is your computer's unique hardware number. Usually written
as: 01:23:45:67:89:ab
MTU
The size in bytes of the largest packet that can be sent or received.
NAT
A technique by which several hosts share a single IP address for accessing to
the Internet.
Ping (Packet Internet Groper)
A utility to determine whether a specific IP address is accessible. It works by
sending a packet to the specified address and waiting for a reply. PING is used
primarily to troubleshoot Internet connections.
SSID
SSID is the name representing the Router in WLAN.
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