Networking Basics 8 - 11 QUIZ

How many binary bits exist within an IPv6 address?

128 IPv4 addressing space is exhausted by the rapid growth of the Internet and the devices connected to the Internet. IPv6 expands the IP addressing space by increasing the address length from 32 bits to 128 bits.

Consider the group of five IPv4 addresses with the subnet mask of 255.255.255.0. Select three of them that belong to the same logical network.

172.16.45.56 172.16.45.12 172.16.45.35

What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?

2001:DB8:0:AB00::1234 There are two rules defining how an IPv6 address can be compressed. The first rule states that leading zeros in a hextet can be eliminated. The second rule states that a single :: can be used to represent one or more contiguous all zero hextets. There can be one and only one :: in an IPv6 address.

Which shortened address is an accurate representation of the IPv6 address 2001:0db8:0000:0000:ab00:0000:0000:0000?

2001:db8:0:0:ab00:: There are two rules to help reduce the notation of IPv6 addresses. The first one is to omit any leading 0s (zeros) in any hextet. The second one is that a double colon (::) can replace any single, contiguous string of one or more 16-bit hextets consisting of all zeros, but the double colon (::) can only be used once within an address. If an address has more than one contiguous string of all-0 hextets, the best practice is to use the double colon (::) on the longest string. So, applying the first rule in the IPv6 address we have 2001:db8:0:0:ab00:0:0:0, and applying the second rule results in 2001:db8:0:0:ab00::

What is the destination IP address when an IPv4 host sends a DHCPDISCOVER message?

255.255.255.255. Because a DHCP client does not have a valid IPv4 address, it must use a broadcast IP address of 255.255.255.255 as the destination address to communicate with the DHCP server. The DHCPDISCOVER message sent by the client is the first message sent in order to make initial contact with a DHCP server.

Place the options in the following order:

A link-local address 169.254.1.5 An experimental address 240.2.6.255 A private address 172.19.20.5 A loopback address 127.0.0.1

A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)

DHCPREQUEST DHCPDISCOVER All DHCP messages between a DHCP-enabled client and a DHCP server are using broadcast messages until after the DHCPACK message. The DHCPDISCOVER and DHCPREQUEST messages are the only messages that are sent by a DHCP-enabled client. All DHCP messages between a DHCP-enabled client and a DHCP server use broadcast messages when the client is obtaining a lease for the first time.

What is one factor increasing the adoption of IPv6 network addresses?

IoT adds millions of network-ready sensors that need IP addresses. Factors that are driving an increase in IPv6 adoption are an increasing internet population, a limited IPv4 address space, issues with NAT and the large number of internet-ready IoT devices.

Which statement is true about DHCP operation?​

The client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network. A DHCP server replies with a DHCPOFFER message. This message offers to the client a lease that contains such information as the IP address and subnet mask to be assigned, the IP address of the DNS server, and the IP address of the default gateway. After the client receives the lease, the received information must be renewed through another DHCPREQUEST message prior to the lease expiration.

What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)

The private IP address blocks that are used inside companies are as follows: 10.0.0.0 /8 (any address that starts with 10 in the first octet) 172.16.0.0 /12 (any address that starts with 172.16 in the first two octets through 172.31.255.255) 192.168.0.0 /16 (any address that starts with 192.168 in the first two octets)

Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

When a DHCP client receives DHCPOFFER messages, it will send a broadcast DHCPREQUEST message for two purposes. First, it indicates to the offering DHCP server that it would like to accept the offer and bind the IP address. Second, it notifies any other responding DHCP servers that their offers are declined.

What are two reasons a network administrator might want to create subnets? (Choose two.)

improves network performance. easier to implement security policies. Two reasons for creating subnets include reduction of overall network traffic and improvement of network performance. Subnets also allow an administrator to implement subnet-based security policies. The number of routers or switches is not affected. Subnets do not simplify network design.

When IPv4 is configured for a computer on a network, what does the subnet mask identify?

the part of the IP address that identifies the network

What is the purpose of the subnet mask in conjunction with an IP address?

to determine the subnet to which the host belongs. With the IPv4 address, a subnet mask is also necessary. A subnet mask is a special type of IPv4 address that coupled with the IP address determines the subnet of which the device is a member. ​

When the IETF began development of IPv6, what was the goal of implementing this technology?

to relieve IPv4 address depletion. IPv6 is designed to be the successor to IPv4. IPv6 has a larger 128 bit address space to provide many more addresses than IPv4.

True or False? Every device on a network needs an IP address to identify itself and communicate on the network.

true. All network devices must have an IP address to communicate on the network. The IP address is used to uniquely identify each device on the network.

A student is helping a friend with a home computer that can no longer access the Internet. Upon investigation, the student discovers that the computer has been assigned the IP address 169.254.100.88. What could cause a computer to get such an IP address?

unreachable DHCP server. When a PC does not have a static IP address or cannot pick one up from a DHCP server, Windows will automatically assign the PC an IP address using APIPA, that uses the range of addresses 169.254.0.0 to 169.254.255.255.

Which two types of devices are typically assigned static IP addresses? (Choose two.)

web servers printers Servers and peripherals are often accessed by an IP address, so these devices need predictable IP addresses. End-user devices often have dynamic addresses that are assigned. Hubs do not require IPv4 addresses to operate as intermediary devices.