14.5. Data transmission across networks
A subsection of Information Technology, 9626, through 14. Communications technology
Listing 10 of 39 questions
Fig. 3 shows a switched network with computers at A, B, C and D. S1, S2, S3, S4, S5 and S6 are switches. A message is being sent between computers at A and B. The whole message is sent at once along the route shown by the arrows. Message Source A C B D S1 S2 S3 S4 S5 S6 Message Destination Network of switches Fig. 3 Explain, with reference to Fig. 3, why this method of sending a message by the route shown is often called ‘store and forward’. Describe two advantages of using the ‘store and forward’ method to send a message over this network.
9626_s18_qp_33
THEORY
2018
Paper 3, Variant 3
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Narinder works as a computer operator for a company which has its own LAN. Describe the characteristics of a LAN, including the technologies used. The company Narinder works for is in Ghana. Her parents live in Tanzania, a long way from Ghana. She writes a blog and uses instant messaging to stay in touch with her parents. Describe four other methods by which Narinder could use the internet to communicate with her parents, giving a different drawback of each method. Method 1 Drawback Method 2 Drawback Method 3 Drawback Method 4 Drawback
9626_s21_qp_12
THEORY
2021
Paper 1, Variant 2
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Questions Discovered
39