Computer Networks Exam 1
In an MDI device, which two pins does the device use to transmit?
1 and 2
What is the maximum cable length for both category 5e and category 6 UTP cable?
100 m
What is the maximum bandwidth for a network cabled using category 5e UTP cable?
1000 Mbps
Which 10 Gigabit standard uses MMF cabling for distances up to 300 meters and is often used for SONET campus networks?
10GBaseSW
A signal has just been received from the WAN link on your network. Using the given components, which of the following shows the path that the signal would take from the WAN to a workstation on your network? Assume all components are used at least once and that some components may be used more than once. 1—backbone cabling 2—entrance facility 3—MDF 4—horizontal wiring 5—IDF 6—work area
2, 1, 3, 1, 5, 4, 6
What is the IEEE standard governing wireless networking?
802.11
Just as a switch keeps records of MAC addresses that it has learned, so does your computer. What protocol does your computer use to learn MAC addresses?
ARP
The SSID is configured on which of the following so that it can be distinguished from other available wireless networks?
Access point
What is one of the disadvantages of a server-based network compared to a peer-to-peer network?
Additional Costs
Each cable type can transport data at a particular speed only so far before its signals begin to weaken past the point that a receiving station can read them accurately What is the term for this phenomenon?
Attenuation
What is a result of absorption on Wi-Fi signals?
Attenuation
What is the term used that defines network cabling between the IDF and MDF?
Backbone Cabling
When referring to network bandwidth, what is the basic unit of measurement?
Bits per second
Which component, located on the motherboard, carries out all the instructions provided by computer programs?
CPU
In wireless networks, what type of media access control is used?
CSMA/CA
What is the media access method used by Ethernet?
CSMA/CD
What are all of the connections in a network considered, including the cables and their connectors?
Cable plant
Which of the following is NOT an advantage of a physical star?
Centralized monitoring and management of traffic
Windows 7 and Windows 10 are examples of which of the following?
Client Operating Systems
Which type of interference is caused by wires in the same cabling bundle?
Crosstalk
What is in an Ethernet frame's trailer?
Cyclic Redundancy Check
What is an advantage of a point-to-point topology?
Data travels on a dedicated link
The entrance facility is the place where the connection to a WAN is located. It is the point where the LAN equipment ends and a third-party provider's equipment and cabling begins. What is another name for this point?
Demarcation Point
Which component manages the details of communicating with the NIC hardware to send and receive data to and from network media?
Device Driver
When data is being prepared for transmission onto the network, it is broken into small pieces and a header and trailer are added to each piece to help identify it. What is this process called?
Encapsulation
A collision can occur on a switch only if the switch is operating in full-duplex mode.
False
Each component of a computer is designed to perform only one specific task-either input, processing, or output.
False
The physical bus topology is no longer used because it required extra cable to connect all the computers and required a central device.
False
When a NIC is in "promiscuous" mode, it will process only the frames in which the destination MAC address matches its own MAC address.
False
What type of wiring should be used for a high-speed connection between two buildings?
Fiber-optic cabling
A wireless access point is most like which other network device, in that all computers send signals through it to communicate with other computers?
Hub
Which structured cabling component provides connectivity to computer equipment in the nearby work area?
IDF
Which of the following is not a function of Network Access Layer switches?
IP address filtering
You are the network administrator for a company and you want to separate the traffic from the accounting department from the rest of the network. However, the accounting department still needs to have access to other network resources. What type of network do you need to implement?
Internetwork
What does a switch do if it doesn't find the destination MAC address in its switching table?
It forwards the frame to all ports
How does a switch "learn" MAC addresses?
It reads the source address and keeps a record of which port the sending computer is on
A MAC address is composed of two 24-bit numbers. What does the first 24-bit number represent?
It's the organizationally unique identifier
What is the purpose of the default route?
It's where the router sends all packets with destinations of which it has no knowledge.
What is one of the disadvantages of a peer-to-peer network compared to a server-based network?
Limited Security
What type of logical topology is at work when using an Ethernet hub?
Logical Bus
Every NIC has a unique address that consists of a 12-digit hexadecimal value. What is this address called?
MAC Address
Which of the following is not an advantage of switches over bridges?
MAC address learing
Which of the following is NOT a characteristic of Unshielded Twisted Pair cabling?
Maximum speed is 100 Mbps
Which topology provides the best fault tolerance?
Mesh
Which type of wireless technology bounces transmissions off walls and ceilings to deliver signals from sender to receiver and is often used with TV remotes?
Microwave
What is a disadvantage of using fiber-optic cabling versus twisted-pair cabling?
More difficult to install
You want a fast CPU for the new computer you are building and your motherboard only has one CPU socket. To increase the processing power, you need a CPU that provides more than one processor. What is this CPU called?
Multicore
In a token ring network, what is the central device called?
Multistation access unit
What component of the computer provides it with a MAC address?
NIC
What command would you issue from a command prompt to see a listing of the computers in your workgroup?
Net View
Repeaters operate at which layer of the TCP/IP model?
Network Access
Which part of the network communication process is responsible for sending and receiving data to and from the network media?
Network Interface
Air waves are an example of what type of network component?
Network Medium
What does it usually mean when the activity light on a switch is blinking?
Network activity is detected
With which kind of Wi-Fi antennas does the signal radiate out with equal strength in all directions?
Omnidirectional
You are building a gaming computer and you want to install a dedicated graphics card that has a fast GPU and 1GB of memory onboard. You need to make sure that you have the right connector available on your motherboard. What type of connector would be appropriate?
PCI-Express
Which of the following is a length of cable that connects a computer to either a networking device or to an RJ-45 jack?
Patch Cable
You have just started a new business. You need to have three to four workstations available for your employees who simply need to share some files and a printer, but you don't have a large budget. Security is not a major concern, but costs are. What type of network would be the most appropriate for your situation?
Peer-to-peer Network
Which of the following is the physical topology that is daisy-chained like a bus and in which the cabling is brought around from the last device to the first device?
Physical Ring
What command would you issue from the command prompt to test whether your computer has connectivity to the network?
Ping IPaddress
In which topology does a central device communicate with two or more other devices and is used in WANs where a main office has connections to several branch offices via a router?
Point-to-multipoint
Which type of of topology requires the use of sub-interfaces on a router?
Point-to-multipoint
Before a computer can transmit data on a wireless network in some cases, it must send What type of signal to the AP?
RTS
In a physical bus topology, both ends of the medium must be terminated in order to prevent what?
Signal Propagation
What type of wireless technology is used for 802.11b networks?
Spread-spectrum radio
When a frame is received, which component reads the source and destination MAC addresses, looks up the destination to determine where to send the frame, and forwards it out the correct port?
Switch
Which of the following connections might require a crossover cable?
Switch to switch
What is the most common topology and technology combination in use today?
Switched / Ethernet
Which of the following is NOT a reason to prefer a switch over a hub?
Switches can operate at 10 Mbps or 100 Mbps.
Which tool measures cable length by transmitting a signal on one end and measuring the time it takes for the reflection to reach the end of the cable?
TDR
Which of the following is NOT one of the main differences between the types of network cabling?
The ability to send and receive signals
What does a switch store in its switching table?
The source MAC address of a frame and the port it was received on
When discussing Ethernet standards, what does the XBaseY terminology refer to?
The transmission speed, the type of transmissions, and the length or type of cabling
Which of the following is true about collisions?
They can occur on Ethernet half-duplex networks
Which of the following is NOT a field in an Ethernet frame?
Time-to-live
Which of the following is NOT a function of a hub?
Transmits the signal to the correct port
A point-to-point topology is typically used for WAN connections or wireless bridges.
True
Because fiber-optic cabling uses light pulses instead of electrical signals, it is immune to interference and highly resistant to eavesdropping.
True
Routers do not forward broadcast packets.
True
There are two basic categories of physical cabling used in Ethernet networks. They are copper wire and fiber optic.
True
What makes a computer a "server" is the fact that it has a server operating system installed on it.
True
Wireless and wired networks are both susceptible to RFI.
True
What is a frame called that is intended for only one individual computer?
Unicast
Which of the following connector types is used for coaxial?
Vampire Tap
The XYZ company has two offices, one in Chicago, and a brand new office in Pittsburgh. To connect the two offices, they will need a dedicated line, probably leased from the phone company. What type of network will they be implementing to connect their two offices?
WAN
You're the network administrator for a company located in Arizona that has just opened an office in Texas. You need to make sure that the two locations can communicate. What type of network are you implementing?
WAN
A peer-to-peer network is also sometinmes called a
Workgroup
Using the physical mail analogy, what part of an address on an envelope is most like the IP address?
Zip Code
When a wireless computer uses a peer-to-peer connection to directly connect to another wireless computer, it is operating in what mode?
ad hoc
What command issued from the command prompt will show the route that a packet travels from the issuing computer to another computer?
tracert
