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39 Cards in this Set
- Front
- Back
08.01
2^0 = ? |
2^0 = 1 |
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08.02 2^1 = ? |
2^1 = 2 |
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08.03 2^2 = ? |
2^2 = 4 |
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08.04 2^3 = ? |
2^3 = 8 |
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08.05 2^4 = ? |
2^4 = 16 |
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08.06 2^5 = ? |
2^5 = 32 |
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08.07 2^6 = ? |
2^6 = 64 |
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08.08 2^7 = ? |
2^7 = 128 |
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08.09 2^8 = ? |
2^8 = 256 |
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08.10 2^9 = ? |
2^9 = 512 |
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08.11 2^10 = ? |
2^10 = 1,024 |
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08.16 What is decimal for the binary 10000000? |
128 |
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08.17 What is decimal for the binary 11000000? |
192
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08.18 What is decimal for the binary 11100000? |
224 |
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08.19 What is decimal for the binary 11110000? |
240 |
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08.20 What is decimal for the binary 11111000? |
248 |
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08.21 What is decimal for the binary 11111100? |
252 |
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08.22 What is decimal for the binary 11111110? |
254 |
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08.23 What is decimal for the binary 11111111? |
255 |
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08.24 Formula for the number of subnets given a CIDR notation? |
Two steps: 1) n = number borrowed bits (ie. a class C subnet 255.255.255.224 /27 burrows 3 bits since 11100000 (base2) = 224 (base 10)) 2) s = number of subnets = 2^n |
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08.25 Formula for number of hosts in a subnet? |
Two steps: 1) n = number of hostbits 2) h = 2^n - 2 |
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08.26 Formula for subnet block-size? |
Two steps: 1) x = decimal value of “borrowed bits” 2) b = block-size = 256-x |
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08.101 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? A. 14 B. 15 C. 16 D. 30 E. 31 F. 62 |
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? A. 14 B. 15 C. 16 D. 30 E. 31 F. 62 |
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08.102 You have a class A host of 10.0.0.110/25. It needs to communicate to a host with an IP address of 10.0.0.210/25. Which of the following devices do you need to use in order for these hosts to communicate? A. A layer 2 switch B. Router C. DNS server D. Hub |
You have a class A host of 10.0.0.110/25. It needs to communicate to a host with an IP address of 10.0.0.210/25. Which of the following devices do you need to use in order for these hosts to communicate? A. A layer 2 switch B. Router ( See below) C. DNS server D. Hub Notice the 10.W.X.Y /25 gives you a Class A private network with... 1) Subnet mask 255.255.255.128. 2) 2 subnets with a block size of 256-128=128. * 1st network … address = 10.0.0.0 … hosts on 10.0.0.1 to 10.0.0.126 … broadcast on 10.0.0.127 * 2nd network … address = 10.0.0.128 … hosts on 10.0.0.129 to 10.0.0.254 … broadcast on 10.0.0.255 |
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08.103 What is the subnetwork address for a host with the IP address 200.10.5.68/28? A. 200.10.5.56 B. 200.10.5.32 C. 200.10.5.64 D. 200.10.5.0 |
What is the subnetwork address for a host with the IP address 200.10.5.68/28? A. 200.10.5.56 B. 200.10.5.32 C. 200.10.5.64 D. 200.10.5.0 (Don’t overthink things. The 200.W.X.Y address is Class C. Class C has a natural CIDR mask of /28) |
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08.104 The network address of 172.16.0.0/19 provides how many subnets and hosts? A. 7 subnets, 30 hosts each B. 7 subnets, 2,046 hosts each C. 7 subnets, 8,190 hosts each D. 8 subnets, 30 hosts each E. 8 subnets, 2,046 hosts each F. 8 subnets, 8,190 hosts each |
The network address of 172.16.0.0/19 provides how many subnets and hosts? A. 7 subnets, 30 hosts each B. 7 subnets, 2,046 hosts each C. 7 subnets, 8,190 hosts each D. 8 subnets, 30 hosts each E. 8 subnets, 2,046 hosts each F. 8 subnets, 8,190 hosts each |
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08.105 You receive a call from a user that is complaining that they cannot get on the Internet. You have them verify their IP address, mask, and default gateway. The IP address is 10.0.37.144, with a subnet mask of 255.255.254.0. The default gateway is 10.0.38.1. What is the problem? A. Invalid IP address B. Invalid subnet mask C. gateway IP is incorrect D. IP address and mask are not compatible. |
You receive a call from a user that is complaining that they cannot get on the Internet. You have them verify their IP address, mask, and default gateway. The IP address is 10.0.37.144, with a subnet mask of 255.255.254.0. The default gateway is 10.0.38.1. What is the problem? A. Invalid IP address B. Invalid subnet mask C. gateway IP is incorrect (Actually, they are in different subnets) D. IP address and mask are not compatible. |
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08.106 If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to? A. 172.16.45.0 B. 172.16.45.4 C. 172.16.45.8 D. 172.16.45.12 E. 172.16.45.16 |
If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to? A. 172.16.45.0 B. 172.16.45.4 C. 172.16.45.8 D. 172.16.45.12 (One crazy question with tiny subnets.) E. 172.16.45.16 |
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08.107 On a network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses? A. /27 B. /28 C. /29 D. /30 E. /31 |
On a network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses? A. /27 B. /28 C. /29 D. /30 (Note that a /30 has 2 host bits, allowing 2^2-2 = 4-2 = 2 hosts. The /31 would have no hosts since 2^1-2 = 2-2 - 0.) E. /31 |
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08.108 On which of the following devices are you most likely to be able to implement NAT? A. Hub B. Ethernet switch C. Router D. Bridge |
On which of the following devices are you most likely to be able to implement NAT? A. Hub B. Ethernet switch C. Router D. Bridge |
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08.109 You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to router interface? A. 6 B. 8 C. 30 D. 62 E. 126 |
You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to router interface? A. 6 B. 8 C. 30 D. 62 E. 126 |
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08.110 When configuring the IP settings on a computer on one subnet to ensure it can communicate with a computer on another subnet, which of the following is desirable? A. Configure the computer with the same default gateway as the other computer. B. Configure the computer with the same subnet mask as the other computer. C. Configure the computer with a default gateway that matches the IP address of the router’s interface that is attached to the same subnet as the computer. D. Configure the computer with a subnet mask that matches the IP address of the router’s interface that is attached to the same subnet as the computer. |
When configuring the IP settings on a computer on one subnet to ensure it can communicate with a computer on another subnet, which of the following is desirable? A. Configure the computer with the same default gateway as the other computer. B. Configure the computer with the same subnet mask as the other computer. C. Configure the computer with a default gateway that matches the IP address of the router’s interface that is attached to the same subnet as the computer. D. Configure the computer with a subnet mask that matches the IP address of the router’s interface that is attached to the same subnet as the computer. |
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08.111 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? A. 192.168.192.15 B. 192.168.192.31 C. 192.168.192.63 D. 192.168.192.127 E. 192.168.192.255 |
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? A. 192.168.192.15 B. 192.168.192.31 C. 192.168.192.63 D. 192.168.192.127 E. 192.168.192.255 |
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08.112 What is the highest usable address on the 172.16.1.0/24 network? A. 172.16.1.255 B. 172.16.1.254 C. 172.16.1.253 D. 172.16.1.23 |
What is the highest usable address on the 172.16.1.0/24 network? A. 172.16.1.255 B. 172.16.1.254 C. 172.16.1.253 D. 172.16.1.23 |
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08.114 If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what would be the subnet address of this host? A. 172.16.112.0 B. 172.16.0.0 C. 172.16.96.0 D. 172.16.255.0 E. 172.16.128.0 |
If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what would be the subnet address of this host? A. 172.16.112.0 B. 172.16.0.0 C. 172.16.96.0 D. 172.16.255.0 E. 172.16.128.0 |
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08.117 If you are forced to replace a router that has failed to the point that you are unable to access its current configuration to aid in setting up interface addresses on the new router, which of the following can you reference for assistance? A. The default-gateway settings on computers from each subnet that the old router interconnected. B. The router’s configuration that was periodically cached on the DHCP server. C. The router’s configuration that was periodically cached on the DNS server. D. The new router will auto-configure itself with the correct settings. |
If you are forced to replace a router that has failed to the point that you are unable to access its current configuration to aid in setting up interface addresses on the new router, which of the following can you reference for assistance? A. The default-gateway settings on computers from each subnet that the old router interconnected. B. The router’s configuration that was periodically cached on the DHCP server. C. The router’s configuration that was periodically cached on the DNS server. D. The new router will auto-configure itself with the correct settings. |
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08.118 You have a network with a subnet of 172.16.17.0/22. Which is the valid host addresses? A. 172.16.17.1 255.255.255.252 B. 172.16.0.1 255.255.240.0 C. 172.16.20.1 255.255.254.0 D. 172.16.16.1 255.255.255.240 E. 172.16.18.255 255.255.252.0 F. 172.16.0.1 255.255.255.0 |
You have a network with a subnet of 172.16.17.0/22. Which is the valid host addresses? A. 172.16.17.1 255.255.255.252 B. 172.16.0.1 255.255.240.0 C. 172.16.20.1 255.255.254.0 D. 172.16.16.1 255.255.255.240 E. 172.16.18.255 255.255.252.0 F. 172.16.0.1 255.255.255.0 |
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08.119 Your router has the following IP address on Ethernet0: 172.16.2.1/23. Which of the following can be valid host IDs on the LAN interface attached to the router? (Choose two.) A. 172.16.0.5 B. 172.16.1.100 C. 172.16.1.198 D. 172.16.2.255 E. 172.16.3.0 F. 172.16.3.255 |
Your router has the following IP address on Ethernet0: 172.16.2.1/23. Which of the following can be valid host IDs on the LAN interface attached to the router? (Choose two.) A. 172.16.0.5 B. 172.16.1.100 C. 172.16.1.198 D. 172.16.2.255 E. 172.16.3.0 (Both would be in the range of valid addresses) F. 172.16.3.255 |
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08.120 You have one IP address provided from your ISP with a /30 mask. However, you have 300 users that need to access the Internet. What technology will you use to implement a solution? A. PAT B. VPN C. DNS D. LANs |
You have one IP address provided from your ISP with a /30 mask. However, you have 300 users that need to access the Internet. What technology will you use to implement a solution? A. PAT (PAT will give you approximately 65,000 hosts) B. VPN C. DNS D. LANs |