Networking

Question 1

Default Gateway

Answer 1

Default gateway is the IP address of the router in the network. In any case, if the users wants to switch on to another network, or if they cannot locate their particular network than their query will be forwarded to default gateway.

Question 2

Packet

Answer 2

A packet is a logical grouping of information that comprises a header which contains user data and location information.

Question 3

IP Address Class

Answer 3

o Class A  ====  0 -126 ( 127 is reserved for loop back)
o Class B  ====  128- 191
o Class C  ====  192-223
o Class D  ====  224-239
o Class E  ====  240-255

Question 4

Firewire Port? What Are Its Uses?

Answer 4

Firewire port is a form of Serial Port that make use of FireWire Technology to transfer data rapidly from one electronic device to another.
FireWire port has the ability to interact with a number of different devices. For example FireWire can provide an ideal way to connect a scanner with computer system. Because transfer rate in FireWire port can reach up to 400Mbps, the data transfer is relatively fast and also result in excellent quality.

Question 5

Identify A Few Firewalls

Answer 5

There are two basic types of firewall – network layer, which make decisions based on source and destination addresses, and application layer, which are hosts run on proxy servers and allow no direct traffic between networks. Comodo and Zone Alarm are two commonly used firewalls.

Question 6

Ipconfig Command? Why It Is Used?

Answer 6

IPCONFIG command is used to display the IP information assigned to a computer.

From the output we can find out the IP address, DNS IP address, gateway IP address assigned to that computer.

Question 7

Apipa Ip Address

Answer 7

When DHCP server is not available the Windows client computer assignes an automatic IP address to itself so that it can communicate with the network cmputers. This ip address is called APIPA. ITs in the range of 169.254.0.0 to 169.254.255.255

APIPA stands for Automatic private IP addressing.

Question 8

Ping Utility

Answer 8

PING: Packet Internet Gropper. It’s a diagnostic utility, which diagnose connectivitybetween computers. It use ICMP: Internet Control Messaging protocol to send echorequests ( usually 4 packets) and receive echo replies (4 packets)

Question 9

Difference Between Physical Address And Logical Address

Answer 9

Physical Address: It’s called as MAC Address (48 bit)

Logical Address : It’s Called as Ip Address (IPv4 -32 bit & IPv6 -128 bit)

Question 10

Public Vs. Private Ip Addresses

Answer 10

Public IP addresses:

A public IP address is any valid address, or number, that can be accessed over the Internet. Internet standards groups, such as the Network Information Center (NIC) or the Internet Assigned Numbers Authority (IANA), are the organizations responsible for registering IP ranges and assigning them to organizations, such as Internet Service Providers (ISPs).

Private IP addresses:

A private IP address is any number or address assigned to a device on a private TCP/IP Local Area Network that is accessible only within the Local Area Network. For a resource inside the Local Area Network to be accessible over the Internet, a device within the Local Area Network must be connected to the Internet with a public IP address, and the networking must be appropriately configured.

10. 0.0.0 10.255.255.255
11. 16.0.0 172.31.255.255
12. 168.0.0 192.168.255.255

Question 11

Subnet Mask

Answer 11

Subnet mask is used for identify the Network.

Example:
For a class A address,  a standard subnet mask is 255.0.0.0,
For a class B address,  a standard subnet mask is 255.255.0.0,
For a class C address,  a standard subnet mask is 255.255.255.0.