Exam Prep Questions

Question 1	Your network is configured with a central hub that has cables coming from it to each host on the network. Which type of network topology is being described? A. Ring B. Bus C. Star D. VLAN
A1:	Answer C is correct because a star network is configured with a central hub that has cables coming from it to each host on the network. Answer A is incorrect because this topology consists of hosts connected to each other in a loop, with each host connecting to its adjacent neighbors. Answer B is incorrect because this topology has a single spur, with hosts connected at regular intervals. Answer D is incorrect because this topology normally represents multiple networks using a single, central intelligent switch. It comprises multiple star networks.
Question 2	A host that provides network resources to other hosts on the network is known as which of the following? A. Client B. Server C. Router D. Bridge
A2:	Answer B is correct. A server provides network resources to other hosts on the network. Answer A is incorrect because this type of host uses the resources provided by a server. Answer C is incorrect because this device is used to connect networks together and forwards packets based on IP address. Answer D is incorrect because this device is used to connect networks together and forwards packets based on the MAC address.
Question 3	Your network is classified as a 10BASE-T network. What is the network media and speed of the network? A. Coaxial cable running at 10Mbps B. Twisted-pair cable running at 10Mbps C. Twisted-pair cable running at 100Mbps D. Fiber- optic cable running at 10Mbps
A3:	The correct answer is B because 10BASE-T refers to a twisted pair cable running at 10Mbps. Answer A is incorrect because the classification would be 10BASE-2 or 10BASE-5. Answer C is incorrect because this would be a 100BASE specification. Answer D is incorrect because fiber-optic cable runs at a minimum of 100Mbps.
Question 4	Which of the following gigabit network classifications are implemented using fiber-optic cable? Choose 2. A. 1000BASE-T B. 1000BASE-X C. 1000BASE-SX D. 1000BASE-LX E. 1000BASE-CX
A4:	Answers C and D are correct because fiber-optic cable is used to implement both 1000BASE-SX and 1000BASE-LX. Answer A is incorrect because this type of network is implemented using Cat-5 twisted-pair cable. Answer B is incorrect because 1000BASE-X refers to three implementations and one of them is 1000BASE-CX, which uses copper cabling. Answer E is incorrect because this type of network is implemented using standard copper cable.
Question 5	You have a star topology network using a central hub and have noticed that the number of collisions is very high. Which device would you install to reduce the number of collisions? A. Bridge B. Hub C. Switch D. Repeater
A5:	Answer C is correct. A switch only forwards packets to the port containing the destination host, and would reduce the network traffic, which in turn , would reduce the number of collisions. Answer A is incorrect because this device is used to connect LANs together and forwards packets based on the destination MAC address. Answer B is incorrect because this device would be the cause of the high collision rate, due to the fact that it forwards packets to all ports instead of just the port containing the host with the destination address. Answer D is incorrect because this device is used to connect network segments by simply boosting the signal.
Question 6	In an Ethernet II frame, what is the preamble field used for? A. To determine the type of data being sent B. To provide synchronization between the sender and the receiver C. To provide error checking D. To detect collisions
A6:	Answer B is correct. The preamble field provides synchronization between the sender and the receiver. Answer A is incorrect because the type field contains this information. Answer C is incorrect because the CRC field contains this information. Answer D is incorrect because this is carried out by the network access method (CSMA/CD).
Question 7	What are the two parts of an ethernet address called? Choose 2. A. PID B. CID C. BID D. VID E. SID
A7:	Answers B and D are correct. The CID is the company identifier, an assigned portion of the ethernet address. The VID is the vendor-specified identifier and is administered by the vendor, who assigns a unique value to this portion of the ethernet address. Answers A, C, and E are invalid because they have no relevance to ethernet addresses.
Question 8	Which command is used to capture packets on the network? A. ping B. netstat C. snoop D. ndd
A8:	Answer C is correct. The snoop command is used to capture packets on the network. Answer A is incorrect because the ping command is used to test the reachability of another host. Answer B is incorrect because the netstat command provides network statistics. Answer D is incorrect because the ndd command is used to inspect and modify network driver parameters.
Question 9	What is the MTU for a physical ethernet interface? A. 1500 bytes B. 1518 bytes C. 46 bytes D. 64 bytes
A9:	Answer A is correct. The maximum transfer unit (MTU) for a physical ethernet interface is 1500 bytes. This is the largest amount of data that can be sent in a single Ethernet II frame. Answer B is incorrect because this value is the maximum size of the ethernet frame, including headers. Answer C is incorrect because this value is the minimum size the data field can be. Answer D is incorrect because this value is the minimum size of an ethernet frame, including headers.
Question 10	Which of the following statements describe an ethernet address? Choose 2. A. A 48-bit address, displayed in hexadecimal, separated by colons (:). B. A 32-bit address, displayed in decimal, separated by dots (.). C. The address is made up of a company identifier and a vendor identifier. D. The address is made up of a network address and a host address.
A10:	Answers A and C are correct. An ethernet address is a 48-bit address displayed in hexadecimal and separated by colons. The ethernet address is made up of a company identifier (CID) and a vendor identifier (VID). Answers B and D are incorrect because they describe IP addresses.