Networking Chapter 2

It's the organizationally unique identifier

A MAC address is composed of two 24-bit numbers. What does the first 24-bit number represent? It's a unique serial number assigned by the manufacturer It's the address it uses for a multicast packet It's the decryption key used for security purposes It's the organizationally unique identifier

hub

A wireless access point is most like which other network device, in that all computers send signals through it to communicate with other computers? switch router hub modem

RTS

Before a computer can transmit data on a wireless network in some cases, it must send What type of signal to the AP? RTS ARP CTS DNS

bits per second

When referring to network bandwidth, what is the basic unit of measurement? bytes per second bits per second bandwidth per second bytes per minute

transmits the signal to the correct port

Which of the following is NOT a function of a hub? cleans up the signal transmits the signal to the correct port receives the signal from a connected computer on one of its ports regenerates the signal

It reads the source address and keeps a record of which port the sending computer is on

How does a switch "learn" MAC addresses? All the MAC addresses must be entered manually. The switch comes loaded with the most frequently used addresses. It reads the source address and keeps a record of which port the sending computer is on The switch uses a mathematical formula to determine what the MAC address would be for each computer connected to it.

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. True or False

ARP

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 ICMP DHCP IP

True

Routers do not forward broadcast packets. True or False

access point

The SSID is configured on which of the following so that it can be distinguished from other available wireless networks? router access point switch repeater

True

The function of a repeater is to extend the range of an existing network. True or False

tracert

What command issued from the command prompt will show the route that a packet travels from the issuing computer to another computer? route tracert ipconfig arp

ping IPaddress

What command would you issue from the command prompt to test whether your computer has connectivity to the network? ping IPaddress arp -d IPaddress ipconfig IPaddress ipconfig /all

It forwards the frame to all ports

What does a switch do if it doesn't find the destination MAC address in its switching table? Sends and error to the sending device Discards the frame Sends an ARP to learn the MAC address It forwards the frame to all ports

the source MAC address of a frame and the port it was received on

What does a switch store in its switching table? the source MAC address of a frame and the port it was received on the destination MAC address of a frame and the port it was received on the source IP address of a frame and the port it was received on the destination IP address of a frame and the port it was received on

unicast

What is a frame called that is intended for only one individual computer? broadcast unicast multicast anycast

It's where the router sends all packets with destinations of which it has no knowledge.

What is the purpose of the default route? It serves as a guideline for how to configure routes. It's a route set by Microsoft so that all information comes to their servers first. It's where the router sends all packets with destinations of which it has no knowledge. It's a route that all routers use to get to the Internet

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. True or False

switch

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? router switch repeater hub

Switches can operate at 10 Mbps or 100 Mbps.

Which of the following is NOT a reason to prefer a switch over a hub? Devices on a hub have to share the available bandwidth. Switches are intelligent; they read the frame and determine where to send it. Switches can operate in full-duplex mode. Switches can operate at 10 Mbps or 100 Mbps.