Different types of Internet Connection & typical Speed

Network Connectivity Type – Transmission Speed
 (i) (Telephone) dial-up modem = 14.4 Kbps 
 (ii) ISDN modem = 56/128 Kbps  
 (iii) T1 connection = 1.54 Mbps  
 (iv) Ethernet = 10 Mbps  
 (v) Token ring = 4/16 Mbps 
 (vi) Fast Ethernet = 100 Mbps 
 (vii) FDDI = 100 Mbps  
 (viii) Gigabit Ethernet = 1 Gbps 
 (ix) ATM = 25Mbps/2.4Gbs

Subnet mask

  • Subnet mask is used to differentiate Network ID and Host ID from a given IP address.
  • The default subnet mask are conventionally expressed as for –
    •  Class A =
    • Class B =
    • Class C =

Loopback Address

  • Loopback address is a special IP address which is used to check local TCP/IP suite or local machine in a computer network, hence sometimes called Local Loopback Address.
  • Data Packets sent to this address never reach the network rather are looped through the network interface card only.
  • Loopback address can be used for diagnostic/testing and troubleshooting purposes to verify that the internal path through the TCP/IP protocols is working.
  • In another words, the loopback address allows for a reliable method of testing about the functionality of an Ethernet card and its drivers with associated software without a physical network.
  • It also allows information technology professionals to test IP software without worrying about broken or corrupted drivers or hardware.
  • This address can also be used to set up multiple server applications on the host because all listening on the same port number.
  • This address is also used to connect to servers running on the local machine.
  • The loopback address is

Local host

  • Local host is normally used when our user or client and host or server is on the same machine or PC. 
  • It is similar as Loopback address but it is represented under the name “localhost”.
  • When we typing ‘local host’ in the browser’s address bar, it will connect with the device itself. 
  • This is handy when we want to connect to a server on our own computer.
  • The purpose of local host is to serve as a domain name for


  • Ping stands for ‘Packet Internet Network Gopher’.
  • Ping uses ICMP(Internet Control Management Protocol) during their functionality.


  • Tracert is a way to find the path information between source and destination.
  • It shows no. of hops between source and destination.
  • Tracert also uses ICMP protocol for finding details.



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