WHAT IS CISCO ?

CISCO is a computer system company.

there are some corse available in cisco certification like :

1> ENTRY LEVEL

CCENT

CCT

2> ASSOCIATED

CCDA

CCNA

CCNA SECURITY

3> PROFESSIONAL

CCDP

CCIP

CCNP

CCNP SECURITY

CCNP SP OPERATIONS

CCNP VOICE

CCNP WIRELESS

CCSP

4> EXPERT

CCDE DESIGN

CCIE ROUTING AND SWITCHING

CCIE SECURITY

CCIE SERVICE PROVIDER

CCIE VOICE

CCIE WIRELESS

What is the PC Firewall?

 It is a protective boundary for any network. It prevents unauthorized access resources on the network. The majority of the operating system from Microsoft systems such as Windows XP Service pack2, generated firewall Utilities.

What is DNS and how it really works?

 DNS means Domain Name System that translates host names into the IP network and IP addresses to host names. Every computer and web domains on the characteristic designated IP addresses. Internet communication is dependent on these IP addresses. These addresses are created in the format of 10.1.1.200, 192.168.2.0, etc. It is difficult these IP addresses to remember, but host names are easier to remember than their IPs.

What is DHCP?

 DHCP is not DHCP. It is used for IP addresses to give computer and other types of network configurations such as DNS. DHCP cut administrative tasks using the IP address for computer systems in a network.

What is Computer Network?

Internet is simply a type of network. When multiple devices are connected, usually we can as a network. If these devices are computers, we will see it as a computer network.