R&S1 Chapter 8 Exam

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.

Considering the addresses already used and having to remain within the 10.16.10.0/24 network range, which subnet address could be assigned to the network containing 25 hosts? 10.16.10.0/26 10.16.10.192/28 25 hosts

10.16.10.64/27

If a network device has a mask of /28, how many IP addresses are available for hosts on the network?

14

Which IP address and prefix will satisfy the need for 50 hosts?

192.168.0.128/26

A DHCP server is used to assign IP addresses dynamically to the hosts on a network. The address pool is configured with 192. 168.10.0/24. There are 3 printers on this network that need to use reserved static IP addresses from the pool. How many IP addresses in the pool are left to be assigned to other hosts?

251

What subnet mask would provide the maximum number of equal size subnets while providing at least 100 host addresses per subnet?

255.255.255.128

Which subnet mask would be used if 5 host bits are available?

255.255.255.224

What is a result of connecting two or more switches together?

The size of the broadcast domain is increased.

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

three

A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that?

- 192.168.1.64/27 - 192.168.1.96/28

What are two reasons a network administrator might want to create subnets?

- improves network performance - easier to implement security policies

Consider the following range of addresses: 2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000:: ... 2001:0DB8:BC15:00AF:0000:: What is the prefix length?

/60

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

1022

A company is deploying an IPv6 addressing scheme for its network. The company design document indicates that the subnet portion of the IPv6 addresses is used for the new hierarchical network design, with the site subsection to represent multiple geographical sites of the company, the sub-site section to represent multiple campuses at each site, and the subnet section to indicate each network segment separated by routers. With such a scheme, what is the maximum number of subnets achieved per sub-site? 2001:DB8:1234:0000::/64 0(site)00(sub-site)0(subnet)

16

Which IP address and prefix will satisfy the need for 100 hosts?

192.168.0.0/25

Which IP address and prefix will satisfy the need for 25 hosts?

192.168.0.192/27

Which IP address and prefix will satisfy the need for 2 hosts?

192.168.0.224/30

Which address would be included in the network 192.168.1.96/27 ?

192.168.1.121

Which address would be included in the network 192.168.1.32/27 ?

192.168.1.48

Which address would be included in the network 192.168.1.64/27 ?

192.168.1.68

What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?

2001:DB8:BC15:A

A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices: IP phones - 22 addresses PCs - 20 addresses Printers - 2 addresses Scanners - 2 addresses The network admin has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?

255.255.255.224

A network admin 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

Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many total host addresses are unused in the assigned subnets? 30 hosts 14 hosts WAN1 WAN2

72

The network administrator has assigned the LAN of LBMISS-ROUTER an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network. By company policies, the router interface is always assigned the first usable host address and the workgroup server is always given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the internet?

IP address: 192.168.10.38 Subnet mask: 255.255.255.248 Default gateway: 192.168.10.33

A network admin needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?

predictable static IP addresses for easier identification