5 Written questions
5 Matching questions
- What subnet and broadcast address is the IP address 172.16.66.10 255.255.192.0 (/18) a member of?
- Additional Cisco Troubleshooting
- Given 172.16.0.0/18, What are the valid hosts?
- What are the valid subnets?
- What is the subnet and broadcast address of the host 172.16.88.255/20?
- a .0.1 - .63.254, .64.1 - .127.254, .128.1 - .191.254, .192.1 - .255.254
- b The subnet is 172.16.64.0. The broadcast must be 172.16.127.255
- c the subnet is 80.0 and the broadcast address is 95.255
- d Tracert, Show ip arp
- e 256 - subnet mask = block size; start with 0 and add the block size until the mask value is reached
5 Multiple choice questions
- 2^x where x is the number of masked bits (or 1's)
- A /29 (255.255.255.248) has a block size of 8 in the fourth octet. This means the subnets are 0, 8, 16, 24, etc. 10 is in the 8 subnet. The next subnet is 16, so 15 is the broadcast address.
- A /29 (255.255.255.248), regardless of the class of address, has only three hosts bits. Six hosts is the maximum amount of hosts on this LAN, including the router interface.
- Facilitated spanning of large geographical distances
- You need 5 subnets, each with at least 16 hosts. The mask 255.255.255.240 provides 16 subnets with 14 hosts—this will not work. The mask 255.255.255.224 provides 8 subnets, each with 30 hosts. This is the best answer.
5 True/False questions
You have a network with a subnet of 172.16.17.0/22. Which are valid host addresses? → A Class B network ID with a /22 mask is 255.255.252.0, with a block size of 4 in the third octet. The network address in the question is in subnet 172.16.16.0 with a broadcast address of 172.16.19.255. Only option E even has the correct subnet mask listed, and 172.16.18.255 is a valid host.
What are the valid hosts in each subnet? → The numbers between the subnets and the broadcasts omitting the all 0s and all 1s
Why subnet? → Reduced network traffic
4 Troubleshooting Steps → Ping 127.0.0.1 (loopback), Ping the local host, Ping Default Gateway (router), Ping remote destination
How many valid hosts per subnet? → The numbers between the subnets and the broadcasts omitting the all 0s and all 1s