Social Networking:
i) Social networking is the use of internet based social media programs to make connections with friends, family, classmates, customers and clients. Social,networking can be done for social purposes, business purposes or both.
ii) The programs show the associations between individuals and facilitate the acquisition of new contacts. Examples of social networking includes Facebook.

Indirect Access:
This is most common method used in home and office networks. The device e.g. computer connects to a network using Ethernet or WiFi and the network connects to the Internet using Asymmetric digital subscriber line ADSL (cable or fibre).
Direct Access:
This is most common method used when travelling. The device e.g. smart phone connects directly to the Internet using 3G/4G mobile networks or public Wi-Fi. There are two ways to look for the information on the web.

The Internet of Things (loT) is the network of physical devices, such as vehicles, home appliances, and other items embedded with electronics, software, sensors, actuators and connectivity which enables these things to connect and exchanges data creating opportunities for more direct integration of the physical world into computer-based systems, resulting in efficiency improvements, economic benefits, and reduced human exertions.

(i) A computer worm is a software program that can copy itself from one computer to another without human interaction.
(ii) Worms can replicate in great volume and with great speed.
(iii) For example, a worm can send copies of itself to every contact in your email address book and then send itself to all the contacts in your contact's address books.