Which of the following is a limitation of early networks that used a daisy-chain method of connecting computers? (choose all that apply)
a. Total number of computers that could be connected
b. The processing speed of the computers connected
c. Cable length
d. No Internet access
a and c
Which of the following is true of a repeatera. Receives frames and forwards them
b. Determines which network to send a packet
c. Receives bit signals and strengthens them
d. Has a burned-in MAC address for each port
c. Receives bit signals and strengthens them
Which of the following is true of a hub? (Choose all that apply)
a. Usually has just two ports
b. Transmits regenerated signals to all connected ports
c. Usually has four or more ports
d. Works with MAC addresses
a and b
Which of the following describes how devices connected to a hub use the speed at which the hub can transmit dataa. Bandwidth optimization
b. Bandwidth dedication
c. Bandwidth sharing
d. Bandwidth multiplier
c. Bandwidth sharing
Which of the following is the unit of measurement by which a hub’s bandwidth is usually specifieda. Bytes per second
b. Bits per second
c. Packets per second
d. Bytes per minute
b. Bits per second
Which of the following is a likely indicator light on a hub? (Choose all that apply)
a. CRC error
b. Link status
c. Connection Speed
d. Activity
e. Signal Strength
b, c and d
Which of the following describes how devices connected to a switch use the speed at which the switch can transmit dataa. Dedicated bandwidth
b. Half-duplex bandwidth
c. Half-scale bandwidth
d. Shared bandwidth
a. Dedicated bandwidth
What does a switch use to create its switching tablea. Source IP addresses
b. Destination logical addresses
c. Destination physical addresses
d. Source MAC addresses
d. Source MAC addresses
What purpose does the timestamp serve in a switching tablea. Tells the switch when to forward a frame
b. Tells the switch how long to wait for a response
c. Tells the switch when to delete an entry
d. Tells the switch how long it has been running
c. Tells the switch when to delete an entry
What feature of a switch allows devices to effectively communicate at 200 Mbps on a 100 Mbps switcha. Uplink port
b. Full-duplex mode
c. Shared bandwidth
d. Bit Strengthening
e. Frame doubling
f. Signal regeneration
b. Full-duplex mode
To which device is a wireless access point most similar in how it operatesa. Hub
b. Switch
c. NIC
d. Router
a. Hub
What’s the purpose of an RTS signal in wireless networkinga. It allows the AP to request which device is the transmitting station
b. It allows the AP to tell all stations that it’s ready to send data
c. It allows a client to notify the AP that it’s ready to send data
d. It allows a client to request data from the AP
c. It allows a client to notify the AP that it’s ready to send data
Which of the following is a common operational speed of a wireless networka. 10 Kbps
b. 110 Gbps
c. 600 Kbps
d. 11 Mbps
d. 11 Mbps
Which of the following is a task performed by a NIC and its driver? (Choose all that apply.)
a. Provides a connection to the network medium
b. Converts bit signals into frames for transmission on the medium
c. Receives packets from the network protocol and creates frames
d. Adds a header before sending a frame to the network protocol
e. Adds error-checking data to the frame
a, b and c
Which of the following best describes a MAC addressa. A 24-bit number expressed as 12 decimal digits
b. Two 24-bit numbers, in which one is the OUI
c. A 48-bit number composed of 12 octal digits
d. A dotted decimal number burned into the NIC
b. Two 24-bit numbers, in which one is the OUI
Under which circumstances does a NIC allow inbound communications to pass through
a. The source MAC address is the broadcast address.
b. The destination MAC address matches the built-in MAC address.
c. The destination MAC address is all binary 1s.
d. The NIC is operating in exclusive mode.
b and c
How does a protocol analyzer capture all framesa. It configures the NIC to capture only unicast frames.
b. It sets all incoming destination addresses to be broadcasts.
c. It configures the NIC to operate in promiscuous mode.
d. It sets the exclusive mode option on the NIC.
e. It captures only multicast frames.
c. It configures the NIC to operate in promiscuous mode

In Windows 10, which of the following displays information about currently installed NICs?

a. Network Connections

b. NICs and Drivers

c. Local Area Networks

d. Computers and Devices

a. Network Connections
Which of the following is the purpose of an SSIDa. Assigns an address to a wireless NIC
b. Acts as a unique name for a local area connection
c. Acts as a security key for securing a network
d. Identifies a wireless network
d. Identifies a wireless network
Which of the following describe the function of routers? (Choose all that apply.)
a. Forward frames from one network to another
b. Connect LANS
c. Attach computers to the internetwork
d. Work with packets and IP addresses
b and c
What information is found in a routing tablea. Computer names and IP addresses
b. Network addresses and interfaces
c. MAC addresses and ports
d. IP addresses and MAC addresses
b. Network addresses and interfaces
You currently have 15 switches with an average of 20 stations connected to each switch. The switches are connected to one another so that all 300 computers can communicate with each other in a single LAN. You have been detecting a high percentage of broadcast frames on this LAN. You think the number of broadcasts might be having an impact on network performance. What should you doa. Connect the switches in groups of five, and connect each group of switches to a central hub.
b. Upgrade the switches to a faster speed.
c. Reorganize the network into smaller groups and connect each group to a router.
d. Disable broadcast forwarding on the switches.
c. Reorganize the network into smaller groups and connect each group to a router.

Review the routing table in Figure 2-29. Based on this figure, where will the router send a packet with the source network number 1.0 and the destination network number 3.0?

[image]

 

a. EthA

b. WAN A

c. WAN B

d. None of the above

c. WAN B
If a router receives a packet with a destination network address unknown to the router, what will the router doa. Send the packet out all interfaces.
b. Discard the packet.
c. Add the destination network to its routing table.
d. Query the network for the destination network.
b. Discard the packet.
Which of the following is true about routers? (Choose all that apply.)
a. Forward broadcasts
b. Use default routes for unknown network addresses
c. Forward unicasts
d. Used primarily to connect workstations
b and c
Access Point (AP)
A wireless device that serves as the central connection point of a wireless LAN and mediates communication between wirelss computers.
Bandwidth Sharing
A network design in which interconnecting devices allow only one connected device to transmit data at a time, thus requiring devices to share available bandwidth.
Broadcast Domain
The scope of devices to which broadcast frames are forwarded. Router interfaces delimit broadcast domains because they won’t forward, whereas switches and hubs do.
Broadcast Frame
A network message intended to be processed by all devices on a LAN; has the destination address FF:FF:FF:FF:FF:FF.
Clear to send (CTS)
A signal an AP generates in response to a request-to-send signal. A CTS signal indicates that the comuter that sent an RTS can tramsit data.
Dedicated Bandwidth
A property of switches in which each port’s bandwidth is dedicated to the devices connected to the port; on a hub, each port’s bandwidth is shared between all devices connected to the hub.
Default Gateway
The address configured in a computer’s IP address settings specifying the address of a router in which the computer can send all packets destined for other/unknown networks.
Default Route
A routing table entry that tells a router where to send a packet with a destination network address that can’t be found in the routing table.
Full-duplex mode
A communication mode in which a device can simultaneously transmit and receive data on the same cable connection. Switches can operate in full-duplex mode, but hubs cannot.
Half-duplex mode
A communication mode in which a device can send OR receive data but can’t do both simultaneously. Hubs operate only in half-duplex mode; switches can operate in both.
Hub
A network device that performs the same function as a repeater but has several ports to connect a number of devices; sometimes called a multiport repeater.
Network Bandwidth
The amount of data that can be transfered on a network during a specific interval; usually measured in bits per second.
Network Interface Card (NIC)
A device that creates and mediates the connection between a computer and the network medium.
Promiscuous mode
An operational mode of a NIC in which all frames are read and processed rather than only broadcast and unicast frames addressed to the NIC. Protocol analyzer software sets a NIC to promiscuous mode so all network frames can be read and anlyzed.
Repeater
A network device that takes incoming signals and regenerates, or repeates them to other parts of the network.
Request to send (RTS)
A Signal used in wireless networks indicating that a computer has data ready to send on the network.
Routers
Devices that enable LANs to communicate with one another by forwarding packets from one LAN to another. Routers also forward packets from one router to another when LANS are separated by multiple routers; they have multiple interfaces and each interface communicates with a LAN.
Service Set Identifier (SSID)
The name assigned to a wireless network so that wireless clients can distinguish between them when more than one is detected.
Switch
A network device that reads the destination MAC address of incoming frames to determine which ports to forward the frames it receives.
Switching Table
A table containing MAC addresses and port pairs that a switch uses to determine which port to forward the frames it receives.
Unicast Frame
A network message addressed to only one computer on the LAN.
Uplinking
Making a connection between devices such as two switches, usually for the purpose of expanding a network.
Uplink port
A designated port on a hub or switch used to connect to another hub or switch without using a crossover cable.

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