CH5 Flashcards
Which of the following addresses is a valid IPv4 address?
- 168.1.256
- 1.25.2
2001: 0000:4137:9e76:3c2b:05ad:3f57:fe98
2001: 0000:4137:9g76:3c2b:05zd:3x57:gh98
10.1.25.2
IPv4 addresses are in dotted decimal format.
Each decimal must be between 0 and 255.
4 Octet Sets.
What class is the following IP Address 192.168.1.5?
Class A
Class B
Class C
Class D
Class C
Range is 192-224
The following two classful IP addresses have the same Network ID?
192.168.1.5 and 192.168.2.6
True
False
False
The first one has a network ID of 192.168.1.0, and the second one has a network ID of 192.168.2.0.
The following classful IP addresses have the same Network ID?
10.80.4.2 and 10.81.15.2
True
False
True
Both have a Network ID of 10.0.0.0
Another name for the “Default Gateway”?
The Router
What is the subnet mask for the following IP Address 192.168.1.5/26?
- 168.1.5
- 255.255.0
- 255.255.192
- 255.255.240
255.255.255.192
The /26 in the IP address is CIDR notation indicating how many bits are a 1 in the subnet mask. The first octet has eight 1s, the second octet has 8 1s, and the third octet has 8 1s, and the fourth octet has 2 1s.
Which of the following IP addresses is in one of the reserved IP address ranges defined by RFC 1918?
- 80.256.1
- 17.34.14
- 169.4.5
- 17.2.5
172.17.34.14
Reserved IP Ranges are as Follows: 10.0.0.1 through 10.255.255.254 172.16.0.1 through 172.31.255.254 192.168.1.1 through 192.168.255.254 Ip addresses can't have numbers greater than 255.
How many hosts are supported in subnet with a network ID of 192.168.1.128/26?
30
32
62
64
62
The formula is 2h -2 where the h is the number of bits used in the host ID. Since 26 bits are used in the network ID, 6 bits are left for the host ID (32-26=6) and 26-2=62.
The following two classless IP addresses have the same network ID?
192.168.1.105/26 and 192.168.1.136/26
True
False
False
The first IP address has a subnet mask of 255.255.255.192 and a network ID of 192.168.1.64.
The second IP address has a subnet mask of 255.255.255.192 and a network ID of 192.168.1.128.
A computer is unable to communicate with other computers on the network. You use ipconfig and see the following information? IP Address: 169.254.5.7 Subnet Mask: 255.255.0.0 Default Gateway: Blank DNS Server: Blank
A DHCP Server can’t be reached.
The Default Gateway needs to be manually configured
The DNS Server IP Address needs to be manually configured.
NONE of the Above
A DHCP Server can’t be reached.
An address starting with 169.254 is an APIPA address.
An APIPA address is assigned to DHCP clients when a DHCP server can’t be reached.
Manually configuring the Gateway or DNS Server IP address isn’t needed for a DHCP Client.