Fundamentals of Data Communication
Finals
An IP address consists of four octets separated by periods. Which part of this address denotes
its class? - ANS-First Octet
How many bits are available in an IPv6 network for creating subnets when the prefix is /48 and
the host ID is 64 bits? - ANS-16
How many bits are in an IPv6 address? - ANS-128
How many host addresses are available on a Class C network? - ANS-254
If your original network address with prefix is 172.16.0.0/16, what should your new network
address with prefix be if you need 16 subnets? - ANS-172.16.0.0/20
The last 64 bits of an IPv6 address are the interface identifier. What is frequently used to specify
the interface identifier? - ANS-the MAC address
What is the binary number system based on? - ANS-powers of 2
what is the decimal equivalent to the binary number 11100000? - ANS-224
What is the decimal equivalent to the hexadecimal number D? - ANS-13
What is the hexadecimal number F equal to in binary? - ANS-1111
When using the route command at a command prompt, which entry indicates the default route?
- ANS-Network Destination 0.0.0.0 Netmask 0.0.0.0
Which command displays the contents of the local DNS cache? - ANS-ipconfig/displaydns
Which IP address is a Class C address? - ANS-193.19.101.11
Which of the following are solutions to the shortage of available IPv4 addresses? - ANS-IPv6
private addressing
subnetting
NAT
Which of the following is an invalid IP address/prefix to assign to a host? -
ANS-172.16.255.128/25
, Which part of a computer's IP address configuration indicates the portion of the address that
specifies the network ID? - ANS-subnet mask
Which subnetmask should you use if you want 16 bits of host address space? -
ANS-255.255.0.0
You are the network administrator for a company that uses a private addressing scheme for its
internal network. You have 300 workstations that regularly access the internet. What process
must be in operation on your network to allow all the workstations to have access to the internet
using only one public IP address? - ANS-PAT
Your computer's IP address is 201.18.149.37/28. Which of the following is a valid default
gateway for this address? - ANS-201.18.149.46
Your network address is 192.168.100.0. What prefix allows you to assign 30 host addresses? -
ANS-/27
At each layer of the OSI model, data is appended to the original message and then sent on to
the next lower layer. What is this process called? - ANS-encapsulation
At what layer do NICs operate? - ANS-Data link layer
At which layer would find errors that were caused by EMI? - ANS-Physical
How can you find out what your MAC address is? (choose all that apply.) - ANS-Right-click on
the Local Area Connection and choose status.
Open a command prompt and type the command getmac.
Open a command prompt and type the command ipconfig/all.
One job that a router performs is that of gatekeeper, which mean that it can be configured to
only allow certain packets access into the network based on a list of rules. What is that process
called? - ANS-access control
The Transport layer segments data into smaller chunks, the size of which is determined by
which of the following? - ANS-MTU
What does the Transport layer use to make sure that a message is reassembled correctly on
the receiving device? - ANS-sequence number
What information would you find in the header of a transport layer PDU? - ANS-window size
What is PDU? - ANS-It is a Network layer protocol that handles path determination.
Finals
An IP address consists of four octets separated by periods. Which part of this address denotes
its class? - ANS-First Octet
How many bits are available in an IPv6 network for creating subnets when the prefix is /48 and
the host ID is 64 bits? - ANS-16
How many bits are in an IPv6 address? - ANS-128
How many host addresses are available on a Class C network? - ANS-254
If your original network address with prefix is 172.16.0.0/16, what should your new network
address with prefix be if you need 16 subnets? - ANS-172.16.0.0/20
The last 64 bits of an IPv6 address are the interface identifier. What is frequently used to specify
the interface identifier? - ANS-the MAC address
What is the binary number system based on? - ANS-powers of 2
what is the decimal equivalent to the binary number 11100000? - ANS-224
What is the decimal equivalent to the hexadecimal number D? - ANS-13
What is the hexadecimal number F equal to in binary? - ANS-1111
When using the route command at a command prompt, which entry indicates the default route?
- ANS-Network Destination 0.0.0.0 Netmask 0.0.0.0
Which command displays the contents of the local DNS cache? - ANS-ipconfig/displaydns
Which IP address is a Class C address? - ANS-193.19.101.11
Which of the following are solutions to the shortage of available IPv4 addresses? - ANS-IPv6
private addressing
subnetting
NAT
Which of the following is an invalid IP address/prefix to assign to a host? -
ANS-172.16.255.128/25
, Which part of a computer's IP address configuration indicates the portion of the address that
specifies the network ID? - ANS-subnet mask
Which subnetmask should you use if you want 16 bits of host address space? -
ANS-255.255.0.0
You are the network administrator for a company that uses a private addressing scheme for its
internal network. You have 300 workstations that regularly access the internet. What process
must be in operation on your network to allow all the workstations to have access to the internet
using only one public IP address? - ANS-PAT
Your computer's IP address is 201.18.149.37/28. Which of the following is a valid default
gateway for this address? - ANS-201.18.149.46
Your network address is 192.168.100.0. What prefix allows you to assign 30 host addresses? -
ANS-/27
At each layer of the OSI model, data is appended to the original message and then sent on to
the next lower layer. What is this process called? - ANS-encapsulation
At what layer do NICs operate? - ANS-Data link layer
At which layer would find errors that were caused by EMI? - ANS-Physical
How can you find out what your MAC address is? (choose all that apply.) - ANS-Right-click on
the Local Area Connection and choose status.
Open a command prompt and type the command getmac.
Open a command prompt and type the command ipconfig/all.
One job that a router performs is that of gatekeeper, which mean that it can be configured to
only allow certain packets access into the network based on a list of rules. What is that process
called? - ANS-access control
The Transport layer segments data into smaller chunks, the size of which is determined by
which of the following? - ANS-MTU
What does the Transport layer use to make sure that a message is reassembled correctly on
the receiving device? - ANS-sequence number
What information would you find in the header of a transport layer PDU? - ANS-window size
What is PDU? - ANS-It is a Network layer protocol that handles path determination.
