22. SCTP and DCCP support real time data transmissions, unlike TCP or UDP a. True b. False 23. SCTP is more vulnerable to Denial-of-Service attacks than TCP a. True b. False 24. SCTP supports multi-streaming and multi-homing features a. True b. False 25. An end point system that allows for network interfaces with multiple IP addresses is known as: a. Multi-homing b. Multi-streaming 26. Protocol that supports multiple simultaneous independent streams that are related through associations in the SCTP protocol is known as: a. Multi-homing b. Multi-streaming 27. DCCP protocol is like TCP with less reliability and like UDP with congestion control a. True b. False 28. Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) are services at which layer? a. Network b. Transport c. Application 29. DHCP function is to temporarily assign an IP address to an end system when logging in as a client on a LAN a. True b. False 30. DNS is a world-wide service that resolves a domain name into an IP address. It is a distributed data base technology a. True b. False 31. Radio waves can be characterized by cither frequency in Hz or by wavelength in meters a. True b. False 32. Radio communications system consists of: transmitter and antenna, free space medium, and receiving antenna with receiver a. True b. False 33. Free space radio wave propagation includes (check all that apply) a. Ground wave b. Sky wave c. Direct wave 34. When a radio wave contacts an object with different electrical property than free space and changes direction as a result is: a. Reflection b. Diffraction c. Scattering 35. When a radio wave bends as a result of hitting a sharpedged object is called a. Reflection b. Diffraction c. Scattering 36. A radio wave contacting objects much smaller that its wave-length and scatters in all directions weakening a signal a. True b. False 37. A radio signal can take only one path from transmitter to receiver a. True b. False 38. Multiple path waves can add at the receiver either constructively, strengthening the signal, or destructively, weakening the signal a. True b. False 38. Multiple path waves can add at the receiver either constructively, strengthening the signal, or destructively, weakening the signal a. True b. False 39. Cellular network features (check all that apply) a. Many low power transmitters over a large area b. Each transmitter covers a hexagonal cell that does not overlap neighboring cells c. Same frequencies are re-used at neighboring cells 40. Transmitter and antenna that provides radio coverage within a single cell is called a. Base station b. Base station controller c. Mobile subscriber 41. Station that controls multiple cell transmitters is known as a. Base station b. Mobile Subscriber c. Base station controller 42. A 'Mobile Switching Center' switches calls from cell sites to existing wired Public Switched Telephone network a. True b. False 43. Automatic change of radio frequencies from one cell to another as a mobile subscriber moves among coverage areas is called a Handoff a. True b. False 44. The stores complete local information for a mobile phone user. a. VLR b. HLR 45. What kind of security attack masquerades as a trusted user to access secure environment in a source routed network a. Spoofing b. Man-in-the-middle c. Replay attack d. Denial-of-service e. Trojan horse f. Session hijacking g. Phishing 22. SCTP and DCCP support real time data transmissions, unlike TCP or UDP a. True b. False 23. SCTP is more vulnerable to Denial-of-Service attacks than TCP a. True b. False 24. SCTP supports multi-streaming and multi-homing features a. True b. False 25. An end point system that allows for network interfaces with multiple IP addresses is known as: a. Multi-homing b. Multi-streaming 26. Protocol that supports multiple simultaneous independent streams that are related through associations in the SCTP protocol is known as: a. Multi-homing b. Multi-streaming 27. DCCP protocol is like TCP with less reliability and like UDP with congestion control a. True b. False 28. Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) are services at which layer? a. Network b. Transport c. Application 29. DHCP function is to temporarily assign an IP address to an end system when logging in as a client on a LAN a. True b. False 30. DNS is a world-wide service that resolves a domain name into an IP address. It is a distributed data base technology a. True b. False 31. Radio waves can be characterized by cither frequency in Hz or by wavelength in meters a. True b. False 32. Radio communications system consists of: transmitter and antenna, free space medium, and receiving antenna with receiver a. True b. False 33. Free space radio wave propagation includes (check all that apply) a. Ground wave b. Sky wave c. Direct wave 34. When a radio wave contacts an object with different electrical property than free space and changes direction as a result is: a. Reflection b. Diffraction c. Scattering 35. When a radio wave bends as a result of hitting a sharpedged object is called a. Reflection b. Diffraction c. Scattering 36. A radio wave contacting objects much smaller that its wave-length and scatters in all directions weakening a signal a. True b. False 37. A radio signal can take only one path from transmitter to receiver a. True b. False 38. Multiple path waves can add at the receiver either constructively, strengthening the signal, or destructively, weakening the signal a. True b. False 38. Multiple path waves can add at the receiver either constructively, strengthening the signal, or destructively, weakening the signal a. True b. False 39. Cellular network features (check all that apply) a. Many low power transmitters over a large area b. Each transmitter covers a hexagonal cell that does not overlap neighboring cells c. Same frequencies are re-used at neighboring cells 40. Transmitter and antenna that provides radio coverage within a single cell is called a. Base station b. Base station controller c. Mobile subscriber 41. Station that controls multiple cell transmitters is known as a. Base station b. Mobile Subscriber c. Base station controller 42. A 'Mobile Switching Center' switches calls from cell sites to existing wired Public Switched Telephone network a. True b. False 43. Automatic change of radio frequencies from one cell to another as a mobile subscriber moves among coverage areas is called a Handoff a. True b. False 44. The stores complete local information for a mobile phone user. a. VLR b. HLR 45. What kind of security attack masquerades as a trusted user to access secure environment in a source routed network a. Spoofing b. Man-in-the-middle c. Replay attack d. Denial-of-service e. Trojan horse f. Session hijacking g. Phishing