Answer:
C. Ethernet over multi mode fiber .
Explanation:
Given that the distance to be covered is 1 km. Multi-mode optic fiber is best suited for short distances of up to 2 km and can withstand harsh environments with less signal attenuation. Single mode fiber is best suited long distance of up to 200 km or more and is expensive as compared to multi-mode fiber Ethernet over twisted pair is best for indoor use and can only cover very short distances. Although UTP and STP are relatively cheap they cannot withstand harsh environments without great signal loss.
Answer:
The answer to this question is "perimeter".
Explanation:
In computer science, the firewall is used to provide a network security system that manages network traffic like incoming and outgoing signals. This traffics is based on predetermined security rules. The firewall typically installs a boundary between a trusted inner network and an untrusted outer network, such as the Internet. It is a software concept and Perimeter firewalls manage the flow of network traffic and host or organization's border the boundary that provides the first line of security against outer attacks and blocking access to inappropriate content from inside an organization.
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