Answer :

GinnyAnswer
To determine which of the given devices can connect directly to the Internet, we need to distinguish between private IP addresses and public IP addresses.

### Private IP Address Ranges
Private IP addresses are reserved for use within a private network and cannot be routed directly to the Internet. The ranges for private IP addresses are:
1. 10.0.0.0 to 10.255.255.255 (Class A)
2. 172.16.0.0 to 172.31.255.255 (Class B)
3. 192.168.0.0 to 192.168.255.255 (Class C)

### Step-by-Step Analysis

1. 172.16.0.100
- This IP address falls within the range 172.16.0.0 to 172.31.255.255.
- Therefore, 172.16.0.100 is a private IP address.

2. 192.168.0.1
- This IP address falls within the range 192.168.0.0 to 192.168.255.255.
- Therefore, 192.168.0.1 is a private IP address.

3. 10.0.0.10
- This IP address falls within the range 10.0.0.0 to 10.255.255.255.
- Therefore, 10.0.0.10 is a private IP address.

4. 4.3.2.1
- This IP address does not fall within any of the private IP ranges mentioned above.
- Hence, 4.3.2.1 is a public IP address.

### Conclusion

Among the given options, the device with the IP address 4.3.2.1 can connect directly to the Internet because it is a public IP address. The other IP addresses (172.16.0.100, 192.168.0.1, and 10.0.0.10) are private IP addresses and cannot connect directly to the Internet.

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