Subnetting and Routing Flashcards
You have a network ID of 131.107.0.0 and you would like to subnet your network into six networks. What is your new subnet mask?
- 224.0.0
- 255.224.0
- 192.0.0
255.255.224.0
Given that we are dealing with a class B address, the default subnet mask is 255.255.0.0. Therefore, if you take three bits (needed for six networks) from the host ID, you will get a new subnet mask of 255.255.224.0
You want to divide your network into eight networks. How many bits will you need to take from the host ID portion of the subnet mask?
2
3
4
3
The formula to calculate how many bits you wish to take from the host ID portion of the subnet mask is 2masked bits = number of subnets. We need to mask three bits to get a minimum of eight networks
In binary, how do you calculate the broadcast address of a network range?
All host bits set to 0
All host bits set to 1, except for the low-order bit
All host bits set to 1
All host bits set to 1
The broadcast address is calculated by converting all host bits to 1
In binary, how do you calculate the network ID of a network range?
All host bits set to 0
All host bits set to 0, except for the low-order bit
All host bits set to 1, except for the low-order bit
All host bits set to 0
The network ID is determined by setting all host bits to 0
The last valid address of a subnet is always:
One more than the broadcast address
One less than the broadcast address
One more than the network ID
One less than the broadcast address
The last valid address is always one less than the broadcast address
Which of the following is an example of CIDR notation?
16/10.34.56.78
- 34.56.78
- 34.56.78/16
10.34.56.78/16
CIDR notation is used to identify how many bits make up the network ID in the IP address. With CIDR notation, you specify the number of bits that make up the network ID by placing a forward slash (/) after the IP address and then the number of bits that make up the network ID: for example, 10.34.56.78/16
Your router has the IP address of 216.83.11.65/27. You wish to connect a new system on the network. Which of the following addresses would you assign to that new system?
- 83.11.45
- 83.11.87
- 83.11.95
216.83.11.87
Because /27 is being used to identify the number of bits that make up the subnet mask, you know the network is subnetted (class C has a /24 by default). In this example, the network that the router is on is the 216.83.11.64 network and 216.83.11.87 is the only valid address on that network listed
You want to add a new route to your Windows router. Which of the following is the correct syntax to add a route to the routing table?
routetable add 12.0.0.0 255.0.0.0 11.0.0.254
routetable add 12.0.0.0 MASK 255.0.0.0 11.0.0.254
route add 12.0.0.0 MASK 255.0.0.0 11.0.0.254
route add 12.0.0.0 MASK 255.0.0.0 11.0.0.254
The command to add a route to a router is route add, and you must supply the MASK keyword when supplying the subnet mask
You wish to view the routing table on the router. Which command can you use?
routetable print
route view
route print
route print
The command to view a routing table is route print
You wish to remove a route from the routing table. Which command would you use?
router remove
route delete
remove route
route delete
To delete a route from the routing table, we use route delete
Which dynamic routing protocol is a distance vector protocol?
OSPF
DIP
RIP
RIP
The RIP routing protocol is a distance vector protocol, meaning that it measures how far a destination is in hops
Which dynamic routing protocol monitors the state of the links?
OSPF
SIP
RIP
OSPF
OSPF is a link state protocol, meaning that it monitors the link between the routers and shares that link state information with other OSPF-enabled devices. The preferred route is always selected based on the link state
Which high-availability routing protocol is a Cisco-proprietary protocol that uses a standby router?
OSPF
HSRP
RIP
HSRP
The Hot Standby Router Protocol (HSRP) is a Cisco-proprietary protocol that offers high availability of a router by configuring an active router, standby router, and a virtual router with a virtual IP address
