5 Written questions
5 Matching questions
- You have a Class B network and need 29 subnets. What is your mask?
- What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?
- You have an interface on a router with the IP address of 192.168.192.10/29. What is the broadcast address the hosts will use on this LAN?
- Unable to Ping Default Gateway
- How many valid hosts per subnet?
- a A /27 (255.255.255.224) is 3 bits on and 5 bits off. This provides 8 subnets, each with 30 hosts. Does it matter if this mask is used with a Class A, B or C network address? Not at all. The amount of hosts bits would never change.
- b 2y - 2 where y is the number of unmasked bits (or 0's)
- c 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.
- d This is 5 bits of subnetting, which provides 32 subnets. This is our best answer, a /21
- e Local physical network problem between NIC and router
5 Multiple choice questions
- /29 is 255.255.255.248. The fourth octet is a block size of 8. 0, 8, 16, 24. The host is in the 16 subnet, broadcast of 23. Valid host 17-22
- Facilitated spanning of large geographical distances
- 11110000 = 240
- The subnet is 172.16.64.0. The broadcast must be 172.16.127.255
5 True/False questions
Unable to Ping Local Host → Local physical network problem between NIC and router
Given 192.168.10.0/28, What are the valid subnets? → 0 & 128
If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what would be the valid subnet address of this host? → A /25 mask is 255.255.255.128. Used with a Class B network, the third and fourth octets are used for subnetting with a total of 9 subnet bits, 8 bits in the third octet and 1 bit in the fourth octet. Since there is only 1 bit in the fourth octet, the bit is either off or on—which is a value of 0 or 128. The host in the question is in the 0 subnet, which has a broadcast address of 127 since 128 is the next subnet.
To test the IP stack on your local host, which IP address would you ping? → This is a pretty simple question. A /28 is 255.255.255.240, which means that our block size is 16 in the fourth octet. 0, 16, 32, 48, 64, 80, etc. The host is in the 64 subnet.
Additional Windows Troubleshooting → Traceroute, Arp -a, Ipconfig /all