No cable restricts the user, who can roam between different wireless networks. Eg: Today’s most successful example for this category is GSM with more than 800 million users.

Advantages of Mobile Computing

Disadvantages of Mobile Computing

Limitations of Mobile Computing

_______is a sublayer of the Data Link Layer specified in the seven-layer OSI model

The transmission range of A reaches B, but not C (the detection range does not reach C either). The transmission range of C reaches B, but not A. Finally, the transmission range of B reaches A and C, i.e., A cannot detect C and vice versa.

Signal strength decreases proportional to the square of the distance. So, B’s signal drowns out A’s signal making C unable to receive A’s transmission. If C is an arbiter for sending rights, B drown out A’s signal on the physical layer making C unable to hear out A.

In TDM, each station can access the medium at any time. This falls under the category

In TDM, each station senses the medium before transmitting. This falls under the category

In TDM, each station follow reservation of the medium before transmitting. This falls under the category

In TDM, each station follow RTS & CTS packets in the medium before transmitting. This falls under the category

The available bandwidth is divided into narrow frequency bands. It is called

The available time period is divided into slots. It is called

In FDMA, Forward link is the communication between

In FDMA, Reverse link is the communication between

Different codes consisting of 0s & 1s are allotted to users. It is called

In CDMA, multiple users access the medium at same time with the help of

In CDMA, all the codes are _____________ to each other

Disadvantage of CDMA are