Title: Module Four Quiz
Course: CNT 2001 Computer Networks & Communications > Section: Module 4 Network Addressing

Q: What 48-bit-long physical address is used to identify a network device?
- IPv4 address
- IPv6 address
- Subnet mask
- MAC address
A: MAC address
If right: A manufacturer gives every network device that it makes a physical binary address. In many cases, this address is binding on the device and cannot be changed. This address is also known as the devices MAC address.

Q: An IPv4 address contains how many bits?
- 24
- 32
- 48
- 128
A: 32
If right: IPv4, the oldest version of the IP protocol now in use, is also the most limited. The logical address used in IPv4 is 32 bits long, broken up into four groups of 8 bits (called octets).

Q: What do you call taking an IP address range and breaking it into smaller pieces?
- supernetting
- subnetting
- address division
- fractal addressing
A: subnetting
If right: In its most basic form, subnetting is taking a given IP address range and breaking it into smaller pieces so that a given range of IP addresses can be used in more than one network. To do this, an IP address is broken into two main parts: the network portion and the host portion.

Q: What is used to determine the network portion of an IP address?
- default gateway
- multicast address
- AND address
- subnet mask
A: subnet mask
If right: The subnet mask is a series of 1s and 0s that the computer uses to determine which part of the IP address is the network ID verses which part is the host. The subnet mask is all 1s followed by all 0s.

Q: What logical truth table is used to isolate the network address from IP address using the subnet mask?
- OR
- AND
- XOR
- XAND
A: AND
If right: The computer uses a logical AND truth table to compare the full IP address of the computer to the subnet mask to determine the network address.

Q: Traditional IP networks were divided into a Class A, Class B, and Class C networks. What do you call this type of addressing?
- classful
- classless
- VLSM
- expanded
A: classful
If right: Originally, a class system was used to determine what part of an IP address was network ID and what part was host. Five classes were created—Class A through Class E—but the general population was allowed to use only the first three classes. This is what is called classful IP addressing.

Q: What is the default subnet mask for the 198.25.4.129 address?
- 255.0.0.0
- 255.255.0.0
- 255.255.255.0
- 255.255.255.255
A: 255.255.255.0
If right: Class C addresses begin with 192 to 223. The default subnet mask for a Class C network is 255.255.255.0.

Q: How many hosts does a Class C network support?
- 126
- 254
- 66,536
- 16,777,216
A: 254
If right: In total, 2,097,152 Class C networks support up to 254 hosts.

Q: Your system is configured to receive DHCP addresses. It is assigned an address of 169.254.34.7. What type address is this?
- loopback address
- multicast address.
- Microsoft Automatic Private IP Addressing
- Experimental
A: Microsoft Automatic Private IP Addressing
If right: The Class B private address block 169.255.0.0 to 169.254.255.255 is used by Microsoft Automatic Private IP Addressing. This address is usually assigned when a DHCP server cannot be reached.

Q: When your system running Windows 7 is configured to receive a DHCP address, what happens when your system cannot contact a DHCP server?
- You are automatically assigned an IP address of 127.0.0.1.
- You are automatically assigned an IP address between 169.254.0.0 to 169.254.255.255.
- You are automatically assigned an IP address of 223.255.255.0 to 223.255.255.255.0.
- You are automatically assigned an IP address of 224.0.0 to 239.255.255.255.
A: You are automatically assigned an IP address between 169.254.0.0 to 169.254.255.255.
If right: Automatic Private IP Addressing (APIPA) is a feature of Windows-based operating systems that automatically assign itself an IP address when there is no DHCP server available. APIPA serves as a DHCP server failover mechanism and makes it easier to configure and support small local area networks (LANs). APIPA assigns address from the Class B Pprivate Aaddress block 169.255.0.0 to 169.254.255.255.

Q: Which of the following is not a private IP address range?
- 10.0.0.0 to 10.255.255.255
- 172.16.0.0 172.31.255.255
- 192.168.0.0 to 192.168.255.255
- 128.0.0.0 to 128.255.255.255
A: 128.0.0.0 to 128.255.255.255
If right: Private, non-routable addresses are 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255.

Q: What is the CIDR notation used for the 255.255.255.0 subnet mask?
- /8
- /16
- /24
- /32
A: /24
If right: When you have a subnet mask of 255.255.255.0, you have 24 masked bits. Therefore, the CIDR notation is /24.

Q: What is the binary equivalent of 180?
- 1011 0111
- 1011 0100
- 1011 1100
- 1111 1100
A: 1011 0100
If right: 128+0+32+16+0+4+0+0=180. Therefore, the binary representation is 1011 0100.

Q: What is the binary equivalent of 255.255.0.0?
- 11111111.11111111.11111111.11110000
- 11111111.11111111.11111111.00000000
- 11111111.11111111.11110000.00000000
- 11111111.11111111.00000000.00000000
A: 11111111.11111111.00000000.00000000
If right: The binary equivalent of 255 is 1111 1111. Therefore, the binary equivalent of 255.255.0.0 is 11111111.11111111.00000000.00000000.

Q: An IPv6 address contains how many bits?
- 24
- 32
- 48
- 128
A: 128
If right: IPv6 (Internet Protocol version 6) is an updated version of IP. IPv6 uses 128 bits for its addresses and is usually expressed in hexadecimal format.

Q: When you send a packet to a host in a remote network, the packet is forwarded to the ___________.
- default gateway
- multicast address
- AND address
- subnet mask address
A: default gateway
If right: To connect to a remote network, you must go through your default gateway. The default gateway (a router) then determines the best route to get to its destination and forwards the packets to the next hop.

Q: What is the hexadecimal equivalent of 255?
- AA
- BB
- DD
- FF
A: FF
If right: If you convert 255 to binary, you have 1111 1111. To convert a binary number to a hexadecimal number, you replace every four 1s and 0s with the equivalent hexadecimal value. 1111 is equivalent to F.

Q: What technology is used for multiple private addresses to access the Internet through a single public address?
- SAP
- NAT
- Multicast
- PAD
A: NAT
If right: Network Address Translation (NAT) is another technology used to stretch out the limited number of IP addresses available with IPv4.

Q: What process combines several small subnets to form a larger network?
- supernetting
- subnetting
- address division
- fractal addressing
A: supernetting
If right: The opposite of subnetting, supernetting combines subnets to form a larger network.

Q: What network service automatically assigns IP addresses to hosts?
- DNS
- WINS
- DHCP
- NAT
A: DHCP
If right: The Dynamic Host Configuration Protocol (DHCP) was developed to allow IP addresses to be assigned dynamically without requiring constant input from the network administrator.

Q: Which of the following addresses can be routed over the Internet?
- 10.24.255.24
- 172.16.3.23
- 132.16.3.24
- 192.168.3.7
A: 132.16.3.24
If right: In the case of private IP addresses, three ranges of IP addresses have been set aside by the Network Information Center that can never be used on public networks. The private address ranges are 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255.

Q: What type of addressing sends packets to a single host?
- unicast
- broadcast
- multicast
- anycast
A: unicast
If right: Unicast refers to a computer sending a packet to only one computer at a time. In this case, the source computer sends a unicast packet only to the computer that the packet is intended for. Most network traffic uses this sort of communication for normal network activity.

Q: Which of the following is a broadcast address?
- 255.0.0.0
- 255.255.0.0
- 255.255.255.0
- 255.255.255.255
A: 255.255.255.255
If right: The IP address 255.255.255.255 indicates that the packet is to be broadcast to every computer on the segment.

Q: What type of addressing sends a single packet to multiple computers?
- unicast
- broadcast
- multicast
- anycast
A: multicast
If right: Multicast is kind of a compromise between unicast and broadcast. Multicast communications are used to send packets to multiple computers at one time, but not to all computers on the network.

Q: What type of addressing sends packets to all computers within a network segment?
- unicast
- broadcast
- multicast
- anycast
A: broadcast
If right: Whereas unicast communication goes just from one computer to another, broadcast communication goes from one computer to all available computers on the network.

Q: What hexadecimal character represents the decimal value of 10?
- A
- B
- C
- F
A: A
If right: Hexadecimal numbers are based on 16 digits. When you reach 9, the next digit is A, which is equivalent to decimal number 10.

Q: What is the first half of a MAC address called?
- host identifier
- subnet identifier
- network identifier
- organizationally unique identifier
A: organizationally unique identifier
If right: Companies can be assigned multiple 24-bit addresses for the manufacturing portion of the network devices they build. These first 24 bits are called the organizationally unique identifier.

Q: What is the address range used for Class D, multicasting?
- 128.0.0.0 to 191.255.255.255
- 127.0.0.0 to 127.255.255.255
- 224.0.0.0 to 239.255.255.255
- 240.0.0.0 to 255.255.255.255
A: 224.0.0.0 to 239.255.255.255
If right: Class D is used for multicasting, which is 224.0.0.0 to 239.255.255.255. Multicasting is used to send a single packet to multiple computers.

Q: Approximately how many addresses does IPv4 support?
- 160 thousand
- 64 thousand
- 16 million
- 4 billion
A: 4 billion
If right: Because IPv4 addresses are limited to just 32 bits, the largest number of computer and other networkable devices that can be assigned a unique IP address is 4,294,967,296.

Q: You have the following four network addresses:
192.168.4.0
192.168.4.1
192.168.4.2
192.168.4.3
If you supernet these addresses, what would the network address be for all four?
- 192.168.4.0 /24
- 192.168.4.0 /26
- 192.168.4.0 /28
- 192.168.4.0 /30
A: 192.168.4.0 /26
If right: Because the default CIDR notation for these networks is /24, and you are combining four networks notated with two bits (four different combinations), it gives you a total of /26.

Q: What is 1011 equivalent to in hexadecimal?
~ Hexadecimal is based on 16 digits—0–F—and is equivalent to 4 bits. 1011 is equivalent to the 11 decimal number or B hexadecimal number.

Q: ______ so far is the newest and least widely adopted IP protocol.
A: IPv6
If right: IP comes in two main versions. The oldest and most widely used is the IP version 4 (IPv4). The newest and least widely adoptedso faris IP version 6 (IPv6).

Q: You see the following address:
91-FC-5D-D9-A3-B0
What type of address is this?
~ A manufacturer gives every network device that it makes a physical binary address. This address is also known as the device’s MAC address.

Q: What do you call it when you use NAT to hide your private addresses from the Internet?
~ NAT is sometimes called network masquerading because with NAT in place, the effective result is to hide the entire network address space inside the router/switch from the ISP, allowing access to the network or the Internet as a whole.

Q: ______ is the oldest and most widely used IP protocol.
A: IPv4
If right: The IP protocol comes in two main versions. The oldest and most widely used is IP version 4 (IPv4).

Q: MAC addresses are considered physical addresses and IP addresses are considered __________ addresses.
A: logical
If right: While physical addressing has to do with the physical address of a computer and is hard coded, logical addressing is something different. Logical addresses have to be assigned to a computer; based on what protocol is being used; different protocols use different standards to do this.

Q: Which type of NAT translates both an IP address and a port number?
~ PAT (Port Address Translation) is what NAT uses to keep track of which device asked for which piece of information. There is a table found in a device that is using PAT that is used to keep track of public and private addresses so that data can be routed accordingly once it is received back at the network.

Q: You see the following address:
172.33.55.128
What type of address is this?
~ IPv4 addresses are generally expressed in 8-bit decimal format.

Q: What is the default subnet mask for the 160.32.63.67 address?
~ Class B addresses begin with 128 to 191. The default subnet mask for a Class B network is 255.255.0.0.

Q: What is the loop back address for IPv4 used in Windows?
~ The loopback address, which sends packets to itself, is 127.0.0.1.

Q: What do you call an IP address that you assign manually?
~ The oldest way to assign IP addresses is called static IP addressing, in which all IP addresses are assigned manually by network administrators. This means that network administrators have to go to each computer individually and manually assign an IP address to it.