Question 1: Choose the correct answer: (5 Marks (0.5 for each)-15 Minutes) 1. A.............. defines the rules that both the sender and receiver and all intermediate devices need to follow to be able to communicate effectively a) Transmission medium b) Protocol c) Data link layer d) Virtual circuit 2. The effectiveness of a data communications system depends on: a) Delivery, accuracy, reliability and Jitter b) Delivery, accuracy, timeliness and Jitte c) Performance, reliability, delivery, accuracy and Jitter d) Performance, reliability and security 3. The port address size is a) 16 bits b) 32 bits 48 bits c) d) 128 bits 4. The transport layer is responsible for the... delivery. a) Hop-to-hop b) Source-to-destination c) Point-to-point d) Process-to-process 5 5. The ********** retransmission scheme to control the errors. a) Data link b) Session c) Presentation d) Application layer imposes mechanisms such as acknowledgeme 6. The a) Physical b) Logical addresses are changed from hop to hop through the network. c) Port d) Physical and logical 7. The number of cable links required for a star network with 10 nodes is: a) 10 b) 20 la( (0-1) 45 2 d) 90 8. The .............layer is responsible for translation, compression, and data encryption. a) Physical b) Transport c) Presentation d) Network 9. A interconnects hosts; while a............. interconnects connecting devices such = switches, routers, or modems. a) MAN/PAN b) LAN/WAN c) WAN/PAN d) WAN / MAN 10. At the destination host, the network layer the header and delivers the payload to the next layer protocol. a) Encapsulate/adding/upper b) Encapsulate/adding/lower Decapsulate/removing/upper d) Decapsulate / removing / lower ***** the packets received, by. ******