What is a Hostname?

The term hostname refers to the unique part that identifies a host on the Internet. In www.noip.com, www is the hostname. In that same example, noip.com is the domain name. The host portion prepended to the domain name is often referred to as the hostname and that is how we use the term here.

Apache

Apache

Apache is a freely available Web server (a system or  application epts )that is distributed under an "open source" license. Version 2.0 runs on most UNIX-based operating systems (such as Linux, Solaris, Digital UNIX, and AIX), on other UNIX/POSIX-derived systems (such as Rhapsody, BeOS, and BS2000/OSD), on AmigaOS, and on Windows 2000. According to a Netcraft (www.netcraft.com) Web server survey 60% of all Web sites on the Internet are using Apache (62% including Apache derivatives), making Apache more widely used than all other Web servers combined.

What is a MAC address?

In a network, the MAC address is a 12-digit hexadecimal(numbers 0 - 9 & aplahabets , A to  F ) unique number that identifies a hardware interface. Just as your social security number uniquely identifies you, a MAC address uniquely identifies a hardware interface on a network. All hardware components in a network including routers, cards, and adapters have MAC addresses.