A network administrator is troubleshooting a PC that cannot connect to the LAN. The administrator runs the ipconfig command at the command prompt and gets the following output:
The subnet mask is incorrect. It only gives you 32 IP address which only 30 are useable. Check out this guys videos on subnetting, easiest method I have ever seen: https://youtube.com/playlist?list=PLp8wxQDS4nSp2urgEIqmrJyf5Wc1vInGg&si=uYG1290cfEQZixT6
255.255.255.224 would be a /27.
The problem is that a /27 creates 8 subnets of 32 hosts. (30 usable host if you exclude the network and broadcast addresses of each subnet)
The Gateway address is 192.168.1.1 which falls into the first subnet of (192.168.1.0 - 192.168.1.31) range, while the PC has the ip address of 192.168.1.55 which falls into the second subnet range of (192.168.1.32 - 192.168.1.63)
The PC is in a different subnet than the gateway.
The subnet mask "225.225.225.224" is not a valid subnet mask. Subnet masks should consist of consecutive 1s followed by consecutive 0s.
A common subnet mask for a typical home or small business network is "255.255.255.0" (or represented as "/24" in CIDR notation). The provided subnet mask is invalid and needs to be corrected.
It's a valid subnet mask. in CIDR notation, 255.255.255.224 would be a /27.
The problem is that a /27 creates 8 subnets of 32 hosts. (30 usable host if you exclude the network and broadcast addresses of each subnet)
Given that the Gateway address is 192.168.1.1 which falls into the first subnet of (192.168.1.0 - 192.168.1.31) range, while the PC has the ip address of 192.168.1.55 which falls into the second subnet range of (192.168.1.32 - 192.168.1.63)
The PC is in a different subnet than the gateway.
A is wrong because the subnet mask is correctly configured for the network. The subnet mask is 255.255.255.0, which means the network has 24 bits for the network ID and 8 bits for the host ID. The network address is 192.168.1.0, and the host address is 192.168.1.100. Both are valid for this subnet.
The correct answer is D, because the PC is not getting a valid IP address from the DHCP server. The PC has an APIPA address, which is in the range of 169.254.0.1 to 169.254.255.254. This indicates that the PC could not contact a DHCP server and assigned itself a link-local address. This address cannot communicate with other devices outside the local network segment. The DHCP server might be down, misconfigured, or unreachable.
The misconfigured parameter in the provided network configuration is:
A. Subnet mask
The subnet mask should be in the standard format, such as 255.255.255.0, which is a typical subnet mask for a Class C network. The value provided (225.225.225.224) is not a valid subnet mask and should be corrected to match the appropriate subnet for the network, often 255.255.255.0 for a typical home or small office network.
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