CSC 285 - Ch. 2 Quiz questions

What are the 4 tasks the NIC performs for outgoing data?

- Receive packets from the network protocol - create frames (by adding the source/destination MAC address and error-checking data) - convert the frame data into bit signals - transmit the signals to the network medium

What are the signals used for the following mediums... - copper wire - fiber-optic cable - wireless networks

- electrical (signals) - light (signals) - radio waves

What are the 5 tasks the NIC performs for incoming data?

- receive bit signals - assemble bit signals into frames - verify the frame's destination address - remove the frame header and trailer - transfer the packet to the network protocol

The scope of devices to which broadcast frames are forwarded is called a(n) _________________.

Broadcast domain

A frame with a destination MAC address composed of all binary 1s or FF-FF-FF-FF-FF-FF in hexadecimal is a(n) _____.

Broadcast message

If a router receives a packet with a destination network address unknown to the router, what will the router do? a. None of these choices. b. Send the packet out all interfaces. c. Discard the packet. d. Query the network for the destination network. e. Add the destination network to its routing table.

c

What does a switch use to create its switching table? a. All of these choices b. Source and destination MAC address c. Source MAC address d. Destination MAC address e. Source logical address

c

What is the purpose of the default route? a. It serves as a guideline for how to configure routes. b. It represents the first-hop router for all outgoing traffic. c. It's where the router sends all packets with destinations of which it has no knowledge. d. It's a route set by Microsoft so that all information comes to their servers first. e. None of these choices.

c

When referring to network bandwidth, what is the basic unit of measurement? a. Gigahertz b. Bytes per second c. Bits per second d. All of these e. Megahertz

c

Put these steps in the proper order for Incoming Data a. Remove the frame header and trailer b. Verify the Frame's destination address c. Receive bit signals d. Transfer the packet to the network protocol e. Assemble bit signals into frames

c, e, b, a, d

Because a switch can control where it sends a frame, devices that are connected to a switch can communicate at the same time, allowing each device to access the full network bandwidth. a. true b. False

true

If a router receives a packet and it does not have an entry in its routing table for the destination network, it will send the packet to its default route, if configured. a. True b. False

true

Routers are devices that enable multiple LANs to communicate with one another by forwarding packets from one LAN to another. a. True b. False

true

When a switch first sees a source mac address, it creates the switching table entry that includes...

- the MAC address - the port where the frame arrived from - a timestamp

What are the 5 steps of switch operation?

- the switch receives a frame - the switch reads the source and destination MAC - the switch looks up the destination MAC in the switching table - the switch forwards the frame to the port where the computer owning the MAC address is located - the switching table is updated with the MAC/port pair

802.11b supports speeds up to _____ Mbps

11 (Mbps)

802.11g supports speeds up to _____ Mbps

54 (Mbps)

802.11n supports speeds from ______ to _____ Mbps

54(Mbps), 300(Mbps)

In a computer's IP address settings, the _____________ is the address of the router to which a computer sends all packets that are intended for networks outside of its own.

Default gateway

In the third step of switch operation, a switch looks up the _____ _____ address in the _____ing _____

Destination MAC, switching table

A broadcast frame is a frame that has a destination MAC address of all binary 1s, which in hexadecimal notation reads as _____.

FF:FF:FF:FF:FF:FF

In the third step for outgoing data, the NIC converts the _____ _____ into _____ _____

Frame data, bit signals

In the fourth step of switch operation, a switch forwards the _____ to the _____ where the computer owning the _____ _____ is located

Frame, port, destination MAC

In the second step for outgoing data the NIC creates _____ by adding the _____/____ _____ addresses and error-checking code

Frames, source/destination MAC

Routers maintain routing tables composed of...

IP address/interface pairs

When a workstation has a packet ready to send, it compares its own _____ address with the destination _____ address in the packet. If the two addresses are on the same network, the workstation gets the _____ computer's _____ address and sends the frame to the local _____ to be delivered to the destination

IP, IP, destination, mac, LAN

Routers connect _____ and switches connect _____

LANs, computers

In the first step for outgoing data, the NIC receives _____ from the _____ _____

Packets, network protocol

In the last step of switch operation, the _____ing _____ is updated with the _____/_____ pair and a ______

Switching table, mac/port, timestamp

In the last step for outgoing data, the NIC _____s the _____ to the _____ _____

Transmits, signals, network medium

What does it usually mean when the activity light on a switch is blinking? a. It is communicating with the network. b. Bandwidth usage has reached a critical level. c. A collision has occurred. d. It is malfunctioning. e. It is ready to receive data.

a

What feature of a switch allows devices to effectively communicate at 200 Mbps on a 100 Mbps switch? a. Full-duplex mode b. Pass-through mode c. Store-and-forward d. Shared bandwidth e. Frame doubling

a

30. Which of the following is a common operational speed of a wireless network? a. None b. 11 Mbps c. 11 Gbps d. 11 MBps e. 11 Gigahertz

b

A MAC address is composed of two 24-bit numbers. What does the first 24-bit number represent? a. It's a unique serial number assigned by the manufacturer. b. It's the organizationally unique identifier for the manufacturer of the device. c. It's the decryption key used for security purposes. d. It's the address it uses for a multicast packet. e. It identifies the type of network to which the device is connected e.g., Ethernet.

b

The SSID is configured on which of the following so that it can be distinguished from other available wireless networks? a. Client b. Access point c. Gateway d. Gateway and client e. All of these

b

Why is the use of a switch preferred over a hub? a. Switches can operate in full-duplex mode. b. All of these choices. c. With a hub, only one computer can successfully transmit at a time. d. Switches are intelligent; they read the frame and determine where to send it. e. Devices on a hub have to share the available bandwidth.

b

Put these steps in the proper order for Outgoing Data a. Transmit the signals to the network medium b. Receive packets from the network protocol c. Convert the frame data into bit signals d. Create frames

b, d, c, a

Put the steps of switch operation in the proper order: a. The switch forwards the frame to the port where the computer owning the MAC address is located b. The switch receives a frame c. The switching table is updated with the MAC/port pair d. The switch looks up the destination MAC in the switching table e. The switch reads the source and destination MAC address

b, e, d, a, c

The network ____________ is a measurement of the amount of data that can pass through a network in a certain period of time.

bandwidth

Small businesses and home networks with wireless networks usually use a Wireless router which is usually used with a _____ _____or _____ _____

cable modem, DSL modem

What are the three network mediums?

copper wire, fiber-optic cable, radio waves

What is a frame called that is intended for only one individual computer? a. multicast b. broadcast c. anycast d. none of these choices e. directed broadcast

d

Which of the following is NOT a function of a hub? a. none of these choices b. cleans up the signal c. receives the signal from a connected computer on one of its ports d. transmits the signal to the correct port e. regenerates the signal

d

Which of the following is the purpose of an SSID? a. Assigns an address to a wireless NIC b. Acts as a security key for securing a network c. Defines the scope of a wireless network d. Identifies a wireless network e. Acts as a unique name for a local area connection

d

Which of the following is true of a repeater? a. Receives frames and forwards them b. Determines which network to send a packet c. None of these choices d. Receives bit signals and strengthens them e. Has a burned-in MAC address for each port

d

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 do? a. Configure each switch to act as a single VLAN. b. Upgrade the switches to a faster speed. c. Disable broadcast forwarding on the switches. d. Reorganize the network into smaller groups and connect each group to a router. e. Connect the switches in groups of five, and connect each group of switches to a central hub.

d

How does a protocol analyzer capture all frames? a. It configures the NIC to capture only unicast frames. b. It sets the exclusive mode option on the NIC. c. Protocol analyzers are incapable of capturing all frames. d. It sets all incoming destination addresses to be broadcasts. e. It configures the NIC to operate in promiscuous mode.

e

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? a. Hub b. Router c. default gateway d. repeater e. switch

e

Which of the following describes how devices connected to a hub use the speed at which the hub can transmit data? a. Bandwidth multiplier b. Bandwidth optimization c. Bandwidth multiplexing d. None of these choices e. Bandwidth sharing

e

Broadcast frames are forwarded by hubs but not by switches and routers. a. True b. False

false

Instead of simply regenerating incoming bit signals and repeating them to all other ports, a hub actually reads data in the message, determines which port the destination device is connected to, and forwards the message to only that port. a. True b. False

false

Routers forward broadcasts, switches don't. a. True b. False

false

The first 24 bits of a MAC address are an ID number for the network, called the network ID, and the last 24 bits are a serial number assigned by the manufacturer. a. True b. False

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. a. True b. False

false

When a computer wants to communicate with a device on another network, it must send the packet to the router so the computer needs to know the address of the router. The address of the router is considered the loopback address. a. True b. False

false

You cannot connect a hub to another hub unless it has an uplink port. a. True b. False

false

For outgoing data, the NIC converts _____ _____ into _____ and transmits them to the _____ _____

frame data, bits, network medium

A multiport repeater is often referred to as a(n) _______________.

hub

For incoming data, the NIC must be able to ________ the ______ used for the network medium. These ______ are then ______ to ______ and assembled into ______

interpret, signals, signals, converted, bits, frames

Routers work with _____ addresses and switches work with _____ addresses

logical (IP), physical (MAC)

When a workstation has a packet ready to send, it compares its _____ _____ _____ with the _____ _____ _____in the packet

own IP address, destination IP address

routers work with _____, switches work with _____

packets, frames

When a workstation has a packet ready to send, it compares its own IP address with the destination IP address in the packet. If the two addresses are on separate networks, the workstation must get the _____'s _____ address and send the frame to the _____

router's MAC, router

Routers use ______ tables, switches use ______ tables

routing, switching

wireless network bandwidth is (dedicated/shared)

shared

In the second step of switch operation, a switch reads the _____ and _____ _____ address

source, destination, mac

What happens when the switch doesn't find the destination MAC address in its switching table?

the switch forwards the frame to all ports