Chapter 8

In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?

/25

A network administrator has decided to use VLSM to subnet the 10.11.0.0/20 network to provide addresses for two new departments and the point-to-point link that separates the two departments. The first department has 796 users and the second department has 31 users. The WAN link requires only two addresses. Which of the following subnets will provide the required contiguous space and waste the fewest addresses?

10.11.0.0/22 10.11.253.64/30 10.11.253.0/26

A junior network technician has subnetted the 10.20.30.0/24 address space by borrowing 3 bits. The technician decides to use the second subnet for the accounting department computers. Which of the following addresses could the technician assign to hosts?

10.20.30.45/27 10.20.30.33/27 10.20.30.61/27

How many usable host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?

1022

How many usable host addresses are created when 4 host bits are borrowed from the 10.20.20.0/24 network?

14

How many subnets can be created if 4 bits are borrowed to specify subnets?

16

A network technician borrows 5 bits from the 10.0.0.0/16 network to create subnets. What is the subnet mask that should be associated with each of the newly created subnets?

255.255.248.0

How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?

3

How many usable host addresses are there in the subnet 192.168.1.32/27?

30

A network administrator has borrowed 3 bits from the 10.20.0.0/25 network to create subnets. The administrator then decided to use the first subnet for point-to-point serial WAN connections each requiring two addresses. How many WAN connections can the administrator address using only the first subnet if he is using VLSM?

4

A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.248. How many usable host addresses will this subnet provide?

6

A new department has been established with 511 hosts that require addresses. Currently the company uses the 10.20.0.0/16 address space. How many bits must the network administrator borrow to provides addresses for this subnet without wasting addresses?

6

What best describes a network broadcast address?

All 1 bits in the host portion of the address

Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks?

It eliminates most address configuration errors It reduces the burden on network support staff.

What would allow devices on different subnets to be able to communicate?

Layer 3 Switch Router

What are advantages of subnetting a large network?

Overall network traffic is reduced Network performance is improved

What is the primary purpose of subnetting IPv6 address space?

Support hierarchical network design

A junior network technician is assigning host addresses to devices in the 192.168.1.0/25 subnet. The departmental printer is assigned the address 192.168.1.131/25 with a 192.168.1.1/25 default gateway. No one in the department is able to print. What is the cause of the problem?

The printer has been assigned an address on another subnet