Msft 2578: Network Essentials

19 Questions | By Svolore | Last updated: Jul 30, 2011 | Total Attempts: 80

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Questions and Answers

1.

Which cable type is used for thick Ethernet network segments?
- A.
  
  RG-8
- B.
  
  RG-58
- C.
  
  RJ-45
- D.
  
  RJ-11
2.

You have been hired by a corporation to design its network. The corporation just moved in to one floor of an older building. The building has existing Category 3 (CAT3) cable. The previous occupants had a 10-megabit-per-second (Mbps) local area network (LAN). Your client does not have the money to upgrade the cable at this time but wants to use a data rate of 100 Mbps for the LAN. All computers currently have network interface cards that support data rates of 10 Mbps and 100 Mbps. Which of the following solutions should you suggest to best meet the needs of your client?
- A.
  
  Advise the client that they can achieve the 100-Mbps data rate desired by keeping the existing CAT3 cabling, because it supports the 100Base-T4 Fast Ethernet standard.
- B.
  
  Advise the client that their network can’t support the 100-Mbps data rate desired using the existing CAT3 cabling and have the client replace their entire cable infrastructure with CAT2.
- C.
  
  Advise the client that they can achieve the 100-Mbps data rate desired by keeping the existing CAT3 cabling, because it supports the 100Base-TX Fast Ethernet standard.
- D.
  
  Advise the client that they can achieve the 100-Mbps data rate desired by keeping the existing CAT3 cabling, because it supports the 100Base-FX Fast Ethernet standard.
3.

What purpose do the twists serve in twisted-pair cabling?
- A.
  
  They prevent collisions.
- B.
  
  They completely eliminate crosstalk from adjacent pairs and electromagnetic interference (EMI).
- C.
  
  They prevent crosstalk from adjacent pairs and limit the effects that EMI has on the signal being carried over the cable.
- D.
  
  They extend the bend radius allowance of the cable.
4.

Which of the following cable connector types is not used with fiber-optic cable?
- A.
  
  Straight tip (ST)
- B.
  
  Subscriber Connector (SC)
- C.
  
  Mechanical Transfer–Registered Jack (MT-RJ)
- D.
  
  F-type
- E.
  
  Fiber Local Connector (LC)
5.

You have been hired to design and implement a network. The client has a small number of users in a single office location. The client wants to use a topology that runs at 100 megabits per second (Mbps) and allows new systems to be added easily to the network. The client is concerned with cost and maintenance issues, such as cable failures that would cause the network to go down. Given this scenario, which of the following would you recommend to the client?
- A.
  
  A bus topology using coaxial cable
- B.
  
  A star topology using twisted-pair cable
- C.
  
  A full mesh topology with fiber-optic cable
- D.
  
  A ring topology with twisted-pair cable
6.

What type of tool do you use to add connectors such as RJ-45 and RJ-11 to twisted-pair cabling?
- A.
  
  A crimper
- B.
  
  A splicer
- C.
  
  A pigtail
- D.
  
  A patch
7.

You have been hired by a corporation to install cabling to connect two existing networks. The two networks are in different buildings approximately 1,000 meters apart. The cable type must support Fast Ethernet data rates of 100 megabits per second (Mbps) and provide a high level of resistance to electromagnetic interference (EMI). Your client wants the most economical cabling solution that meets the corporation’s needs. What cable type best meets the needs of this corporation?
- A.
  
  Multimode fiber-optic cable
- B.
  
  Shielded twisted-pair (STP)
- C.
  
  Unshielded twisted-pair (UTP)
- D.
  
  Thin coaxial cable
- E.
  
  Singlemode fiber-optic cable
8.

Which type of cable and connector is used to attach a television set to a cable television (CATV) network?
- A.
  
  A fiber-optic cable and a Straight Tip (ST) connector
- B.
  
  A coaxial cable and a Bayonet-Neill-Concelman (BNC) connector
- C.
  
  A twisted-pair cable and an RJ-45 connector
- D.
  
  A coaxial cable and an F-type connector
- E.
  
  An AUI cable and a vampire tap connector
9.

While replacing a light fixture in the office building housing Contoso, Ltd., a maintenance worker accidentally severs a network cable in the drop ceiling. Contoso uses a variety of local area network (LAN) technologies throughout the structure, but on that particular floor there are three separate LANs: a 10-node thin Ethernet LAN using coaxial cable in a bus topology, a 25-node Fast Ethernet LAN using twisted-pair cable in a star topology, and a 5-node Fiber Distributed Data Interface (FDDI) LAN using fiber-optic cable in a double ring topology. Without knowing which of the LANs the severed cable belongs to, what is the maximum number of computers that will be directly affected by the cable break?
- A.
  
  0
- B.
  
  1
- C.
  
  5
- D.
  
  10
- E.
  
  25
10.

Which of the following topologies is not used in local area networks (LANs)?
- A.
  
  Bus
- B.
  
  Star
- C.
  
  Mesh
- D.
  
  Ring
11.

Which of the following topologies is usually physically configured as a star using a central hub, but logically operates as a ring?
- A.
  
  Bus
- B.
  
  Star
- C.
  
  Full mesh
- D.
  
  Full star
- E.
  
  Ring
12.

Which twisted-pair cable category is rated for both a 10-megabit-per-second (Mbps) data rate (using two pairs) and a 100-Mbps data rate (using four pairs)?
- A.
  
  Category 2 (CAT2)
- B.
  
  Category 3 (CAT3)
- C.
  
  Category 4 (CAT4)
- D.
  
  Category 5 (CAT5)
- E.
  
  Category 5e (CAT5e)
13.

You have been hired to install network cabling for a small private company with 15 employees who need to share files and printers. All employees are physically located within the same building in two separate office spaces directly adjacent to each other, sharing a common wall and door for access. Both offices have drop ceilings with ceiling tiles. Your client wants a simple, fast [100 megabit-per-second (Mbps)] network installation that’s easy to troubleshoot. In addition, your client wants to keep installation costs to a minimum. From the following list, select the combination of topology, cable type, and installation method that best meets your client’s needs.
- A.
  
  Star topology, fiber-optic cabling, and internal installation
- B.
  
  Ring topology, coaxial cabling, and external installation
- C.
  
  Full mesh topology, fiber-optic cabling, and external installation
- D.
  
  Star topology, coaxial cabling, and external installation
- E.
  
  Star topology, twisted-pair cabling, and external installation
14.

What type of tool do you use to connect bulk cable runs to wall plates and patch panels?
- A.
  
  A crimper
- B.
  
  A splicer
- C.
  
  A pigtail
- D.
  
  A punchdown block tool
15.

Which cable type is typically configured in a star topology, uses eight copper conductors arranged in four pairs, and uses RJ-45 connectors?
- A.
  
  RG-8
- B.
  
  Twisted-pair
- C.
  
  RG-58
- D.
  
  Fiber-optic
16.

Which of the following topologies broadcasts transmitted signals to all end systems connected to a central device using twisted-pair cabling?
- A.
  
  Bus
- B.
  
  Star
- C.
  
  Full mesh
- D.
  
  Wireless
- E.
  
  Ring
17.

You have been hired by a corporation to design and implement a single local area network (LAN) for its manufacturing plant. The manufacturing division uses sophisticated equipment to produce circuit boards. The controllers that manage the manufacturing equipment require a deterministic network topology that isn’t subject to collisions in order to guarantee access to the communication channel. The LAN needs to support a data rate of 100 megabits per second (Mbps) and provide a backup path for communication if there is a physical layer failure. Which of the following solutions best meets this corporation’s needs?
- A.
  
  Install a Fast Ethernet network configured as star topology and use Category 5 (CAT5) or Category 6 (CAT6) cable (which support 100 Mbps) for the LAN.
- B.
  
  Install a Fiber Distributed Data Interface (FDDI) ring network configured in a double ring topology and use fiber-optic cabling for the LAN.
- C.
  
  Install a Token Ring network configured as a ring topology and use shielded twisted-pair (STP) type 1 and 6 cabling for the LAN.
- D.
  
  Install a Fast Ethernet network configured as a linear bus topology and use Category 3 (CAT3) cable for the LAN.
18.

You are a network consultant who has been contracted to evaluate a network design created for Contoso, Ltd., by another consultant. The network is to be installed in a large warehouse that needs 20 workstations scattered throughout the building, to run an inventory database application. The two most distant computers are 150 yards apart. The primary goal for the network design is to connect all 20 workstations to a single local area network, running at 10 megabits per second (Mbps). The two secondary goals are to provide sufficient fault tolerance for a single cable break to occur without affecting the entire network and to provide resistance the electromagnetic interference (EMI) generated by machinery in the warehouse. The design created by the other consultant calls for a thin Ethernet LAN with all of the computers connected to a single cable segment. Which of the following statements about the proposal is true?
- A.
  
  The solution achieves neither the primary goal nor either of the secondary goals.
- B.
  
  The solution achieves the primary goal but neither of the secondary goals.
- C.
  
  The solution achieves the primary goal and one of the secondary goals.
- D.
  
  The solution achieves the primary goal and both of the secondary goals.
19.

You have been hired by a corporation to design the cabling for their network. The corporation just moved in to two different floors of an older building. The building has existing Category 3 (CAT3) cable. Your client wants two separate local area networks (LANs), one on each floor, with a backbone network connecting them. Your client wants a 100-megabit-per-second (Mbps) data rate for each LAN but plans on migrating to 1,000 Mbps in the future. The two networks are approximately 600 meters apart. Which of the following solutions best meets the needs of this corporation?
- A.
  
  Install Category 5e (CAT5e) or Category 6 (CAT6) cable for the LANs. These cables run at 100 Mbps and provide a migration path to 1,000 Mbps. Use twisted-pair cable for the backbone network.
- B.
  
  Use the existing CAT3 wiring for the LANs, because CAT3 runs at 100 Mbps and provides a migration path to 1,000 Mbps. Use thick coaxial cable for the backbone network.
- C.
  
  Install CAT5e or CAT6 cable for the LANs. These cables run at 100 Mbps and provide a migration path to 1000 Mbps. Use multimode fiber-optic cable for the backbone network.
- D.
  
  Install CAT5e or CAT6 cable for the LANs. These cables support 100 Mbps and provide a migration path to 1,000 Mbps. Use the existing CAT3 cable for the backbone network.