Q1/ Indicate a single answer for each of the following: 10 marks 1. The ........ mode is used in cases where there is no need for communication in both directions at the same time. a. Simplex b. Half-duplex c. Full-duplex d. Point to point 2- ....... is the way that used by two or more communication devices attach to a link: point-to-point or multipoint. a. Connection type b. Transmission mode c. Topology d. Internetwork 3- ............ provides long-distance transmission of data over large geographic areas. a. LAN b. MAN c. WAN d. All of them 4- ..... is the obtained data unit when decapsulates the frame. a. Message b. Bit c. User datagram d. Segment e. Datagram ..networks, a dedicated connection is always available between the two end systems. a. reliable b. circuit-switched c. packet-switched d. secure 6- ............... cable can support highest bandwidth and greater transmission distance than any other guided media. a. UTP b. STP c. Coaxial d. Fiber-optic 7. In propagation, very high frequency are transmitted in straight line directly from antenna to antenna. a. line-of-sight b. sky c. Ground d. none of them 5- In a ....... 8- Cat 5 UTP cable is used for data transmission up to.............. a. 10Mbps b. 100Mbps c. 200Mbps d.1Gbps 9- A beam of light moves from one medium to another medium with less density, if the incident angle is less than the critical angle, the ray a. reflect b. refract c. attenuate d. not affected 10- signals can be used for short-range communication in a closed area using line-of-sight propagation a. Line-of-sight b. Radio wave c. Microwave d. Infrared