Technical Questions

Fragmentation occurs in a dynamic memory allocation system when many of the free blocks are too small to satisfy any request.

It is a very simple protocol used for transmission of IP datagrams across a serial line.

In Computers ::

A network is a collection of computers, servers, mainframes, network devices, peripherals, or other devices connected to one another to allow the sharing of data.

An excellent example of a network is the Internet, which connects millions of people all over the world. Below is an example image of a home network with multiple computers and other network devices all connected to each other and the Internet.

Ex:: LAN, WAN, MAN, WLAN,...

In Business view::

Networking is defined as the act of making contact and exchanging information with other people, groups and institutions to develop mutually beneficial relationships.

Here we are initalising the function pointer p to the address of the function fun(). But during this initialisation the function has not been defined. Hence an error.

To eliminate this error add the prototype of the fun() before declaration of p, as shown below:

extern int fun();    or simply  int fun();

It is a host that has a multiple network interfaces and that requires multiple IP addresses is called as a Multi-homed Host

diskcopy

A typedef defines a new name for a type, and in simpler cases like the one shown below you can define a new structure type and a typedef for it at the same time.

typedef struct

{

    char name[20];

    int age;

} emp;

However, in the structure defined in this question, there is an error because a typedef declaration cannot be used until it is defined. In the given code fragment the typedef declaration is not yet defined at he point where the link field is declared.

There is no difference except for the fact that the first one gives a hint that the function fun() is probably in another source file.