1. Select the Cable That Is Best for Avoiding EMI and RFI?

NSA 152 Network + EXAM 1

1. Select the cable that is best for avoiding EMI and RFI? A. Shielded twisted-pair cable (STP) B. Coaxial cable C. Fiber-optic cable D. Unshielded twisted-pair cable (UTP)

2. Which of the following are characteristics of a star topology? (Select all that apply) A. A single cable failure can bring down the entire network. B. It has a single point of failure. C. Has a smaller amount of cable than a comparable bus topology network. D. Has a larger amount of cable than a comparable bus topology network.

3. One major difference between the LAN and the WAN networks is: A. LANs are limited to a specific area, while WANs cross metropolitan, regional, or national boundaries. B. Only WANs use routers. C. WANs can only use full-duplex communications while LANs can use either full or half-duplex communications. D. WANs cannot be connected on demand and LANs can be connected on demand.

4. Which of the following is not one of the three primary components of a network? A. Workstations B. Servers C. Topologies D. Hosts 5. Which of the following network cable types are matched with the correct acceptable speed? (Select all that apply) A. Category 2 - 4Mbps B. Category 3 - 10Mbps C. Category 4 - 100 Mbps D. Category 6 - 1000Mpbs

6. Which of the following is NOT one of the four most common topologies? A. Bus B. Star C. Mesh D. Perimeter 7. Which of the following is not an advantage of the bus topology? A. It is simple to install. B. It is relatively inexpensive. C. It is easy to move and change. D. It uses less cable than other topologies.

8. In a star topology, each computer is connected to a central point by a separate cable. This central point can be a ______. (Select all that apply) A. Hub B. MAU C. Switch D. Firewall

9. With Fast Ethernet, a station attaches to the hub via ______. A. Category 5 UTP B. Coaxial cable C. BNC connector D. Category 3 STP 10. Which of the following are not physical Ethernet specifications or are not matched correctly with their maximum speeds? (Select all that apply) A. 10Base5 - 5Mbps B. FDDI - 1000Mbps C. 1000BaseSX - 1000Mbps D. 100BaseT - 100Mbps E. 1000BaseEX - 1000Mbps F. 10Base2 - 2Mbps

11. Which of the following standards are matched with the correct topic? (Select all that apply) A. IEEE 802.4 - Token Bus B. IEEE 802.5 - Token Ring C. IEEE 802.8 - Wireless LAN D. IEEE 802.11b - Fiber Optic LANs and MANs E. IEEE 802.12 -Demand Priority Access Method F. IEEE 802.2 - Logical Link Control

12. Which of the following protocols can not be routed? A. NetBEUI B. TCP/IP C. Ethernet D. IPX

13. Which of the following is not a layer of the OSI model? A. Application B. Network C. Data Link D. Transfer

14. The ______layer is responsible for logical addressing and translating logical addresses into physical addresses. A. Application B. Session C. Data Link D. Network

15. The ______layer is responsible for establishing, maintaining, and breaking sessions. A. Session B. Data Link C. Protocol D. Presentation E. None of the above.

16. The Data Link layer is made of two sub-layers called the ______and the ______. A. Media Access Control (MAC) B. Network Control Layer (NCL) C. Data Passing Control (DPC) D. Logical Link Control (LLC)

17. The ______layer creates frames from packets. These frames include information about where the data is meant to go, where it came from, and the overall validity of the bytes sent. A. Physical B. Data Link C. Presentation D. Session

18. What is the process of moving data throughout an internetwork? A. Transfer B. Routing C. Portioning D. Networking

19. The ______layer defines the protocols for multiplexing applications and can define protocols that acknowledge and check the validity of transmissions. A. Session B. Transport C. Network D. Data Link 20. What software component is necessary for the operating system to use the network card? A. NetBEUI B. LAN card Drivers C. Diagnostic utilities D. DOS 21. The ______network topology is the most fault tolerant and provides the most redundancy. 22. What type of cable is used on a 100BaseT network? A. STP B. Coaxial C. Fiber Optics D. UTP

23. What purpose do the twists in STP (shielded twisted pair) cable serve? A. Makes the cable more flexible B. Provides added strength C. Minimized electrical interference D. Allows twist on-connectors E. Prevents unwanted tangling

24. Wireless networking defined by A. 802.1 B. 802.11 C. 802.3 D. 802.4

25. The ______layer is responsible for end-to-end control and error correction. A. Layer 4 (Transport) B. Layer 5 (session) C. Layer 6 (Presentation) D. Layer 7 Application 26. Logical Link Control is defined with A. 802.1 B. 802.2 C. 802.3 D. 802.4

27. When encypting data for a VPN, this typically occurs at layer ______A. Layer 7 (Application) B. Layer 6 (Presentation) C. Layer 5 (Session) D. Layer 4 (Transport)

28. Physical addresses, for example MAC addresses that are 'hardwired' are used by A. Layer 7 (Application) B. Layer 5 (Session) C. Layer 3 (Network) D. Layer 1 (Physical)

29. 802.11b uses the ______access method. A. CSMA/CD B. CSMA/CA C. Token Ring D. Cell 30. Gigabit Ethernet can run on what category of copper cable? A. Cat 1 B. Cat 3 C. Cat 5 D. Type 3 31. At what layer are hardware addresses maintained? A. Physical B. Data Link C. Session D. Transport 32. What layer of the OSI model would be concerned with user applications such as word processing and spreadsheets? A. None. This level of functionality is not addressed with the OSI model B. The Application layer C. The Program layer D. The TCP/IP Layer E. The IP layer

33. Which OSI layer initiates retransmit requests? A. The Transport Layer 4 B. The Network Layer 3 C. The Physical Layer 1 D. The Session Layer 5 E. The Application Layer 7

34. Which OSI layer defines electrical specifications? A. Network B. Presentation C. Application D. Physical 35. Which layer of the OSI model is responsible for establishing, maintaining, and terminating connections? A. Physical Layer B. Data Link layer C. Network layer D. Session layer

36. Which of the following devices translates protocols? A. Router B. Gateway C. Bridge D. Server 37. Bridges operate at the ______layer of the OSI model. A. Data Link B. Top C. Transport D. Session 38. What are devices connected on a TCP/IP network commonly referred to as? A. Routers B. Servers C. Resources D. Hosts

39. Which of these protocols are routable? (Choose two) A. IP B. IPX C. TCP D. NetBIOS 40. Which of the following uses computer names as addresses? A. DHCP B. NetBIOS C. LMHOSTS D. IPX 41. Metropolitan Area Networking (MAN) is defined in A. 802.5 B. 802.6 C. 802.7 D. 802.8 42. IDSN is defined by A. 802.1 B. 802.3 C. 802.6 D. 802.9 43. The ______IEEE standard defines MAC addresses for Token Ring networks. 44. How many categories are defined by the IEEE 802 committee? A. 16 categories B. 7 categories C. 3 categories D. 2 categories

45. What is an external transceiver typically used for? A. Convert the physical connection from one Ethernet type to another B. To bridge to different LANs C. To regenerate and strengthen the data packets D. The convert from Ethernet to Token Ring

46. Your company has expanded and wishes to integrate with another building that is approximately 1 kilometer away. For some unspecified reason, you cannot use repeaters. What type of cabling will you install? A. 100BaseT B. 100BaseFX C. 10Base5 D. 10Base2

47. Which of the following are characteristics of Category 5 cabling? A. UTP B. 100/Mbps C. 100-meter limit D. 4 Pairs of wires E. All the above

48. 100BaseT requires ______wires. A. One B. Two C. Three D. Four 49. A PC in the corner of your building cannot communicate with the network, and all other nodes seem to be slower than normal. There are 103 meters of CAT5 UTP (Unshielded Twisted Pair) cabling between the corner PC and the network hub. Required results:  Establish connectivity between the computer and the network.

 Increase network performance. Optional results:  Decrease network downtime.  Increase server processing.

 Lower operating costs. Proposed solution:  Replace the current NIC in the non-communicative PC with a 100BaseFX network card.

 Install a repeater between the non-communicative PC and the hub.

 Install new NICs in all other PCs.

A. The proposed solution meets the required results and all of the optional results. B. The proposed solution meets the required results and two of the optional results. C. The proposed solution meets the required results and one of the optional results. D. The proposed solution does not meet the required results.. 50. A laptop computer using 802.11b connects to a LAN at some locations, and not other locations. Possible reasons for this include: A. Improper MAC address B. Interference from motors or other EMI sources C. Out of signal range D. Both B & C