1 A source computer’s ability to reach a specified destination computer can be tested using which of the following?
a curl
b ping
c ipconfig
d ipconfig
2 Which of the following best describes a faraday cage?
a A Faraday cage is used to dispose of electronic waste.
b A Faraday cage is an enclosure used to block electromagnetic fields
c A Faraday cage blocks suspicious packets from entering an electronic device.
d A Faraday cage 15 used to charge the electronic devices.
The Correct Answer and Explanation is :
- Answer: b) ping
Explanation:
The ping command is a network diagnostic tool that is used to test the connectivity between a source computer and a destination computer or device on a network. It works by sending a small packet of data (ICMP Echo Request) to the destination and waiting for a response (ICMP Echo Reply). This helps determine whether the destination is reachable and the round-trip time it takes for the packet to travel between the two devices. If the destination is reachable, the response will include the time taken for the packet to return. If not, an error message will indicate that the destination is unreachable.
The ping command is useful for troubleshooting network connectivity issues and assessing the quality of the connection. It can be used to check if a specific IP address or domain is reachable over the network, which is essential when diagnosing network problems such as downtime or intermittent connectivity.
The other options (curl, ipconfig, and ipconfig repeated) are not used specifically to test connectivity:
curlis a command-line tool used to transfer data to or from a server using various protocols (HTTP, FTP, etc.).ipconfigis a command used in Windows to display and manage the network configuration, including IP addresses, DNS settings, and routing information.
- Answer: b) A Faraday cage is an enclosure used to block electromagnetic fields
Explanation:
A Faraday cage is an enclosure made of conductive materials, such as metal, that is designed to block external electric fields and electromagnetic radiation. When an external electromagnetic field encounters the conductive material, it causes the charges in the material to rearrange, effectively canceling out the incoming field inside the cage. This principle makes Faraday cages useful for a variety of applications where sensitive electronics need to be protected from interference or where electromagnetic fields must be contained.
Faraday cages are commonly used in:
- Protecting electronic devices from electromagnetic interference (EMI) or radio frequency interference (RFI).
- Shielding devices from lightning strikes or electrical surges.
- Secure environments where signals need to be blocked for privacy or security purposes, such as in the case of preventing eavesdropping or hacking.
In contrast to the incorrect options:
- A Faraday cage is not used to dispose of electronic waste (option a).
- It does not block suspicious packets or filter network traffic (option c).
- It is not used for charging electronic devices (option d).
Overall, the Faraday cage serves as an effective shield against electromagnetic radiation, making it vital for safeguarding sensitive electronics from external interference.