<span>An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a
</span>
Google intended the limited initial rollout to be a test of google glass, that the adopters were Innovators.
The initial rollout of Google Glass was limited, purposefully so as to set the price very high. This mean that only a selected few, and those with plenty of disposable income, would be the first to use these devices. Google required people to register for the chance to receive a set. Even if many would want to spend the money on these devices, Google allowed only a selected few to receive them.
Answer:
Option A- Reference materials
Explanation:
Reference Materials A digital reference library that provides more than 600 high-quality reference books from the world's leading publishers to be searched online by data points and trends
Complete Question:
Firewall implementation and design for an enterprise can be a daunting task. Choices made early in the design process can have far-reaching security implications for years to come. Which of the following firewall architecture is designed to host servers that offer public services?
a) Bastion Host
b) Screened subnet
c) Screened host
d) Screened
Answer:
b) Screened subnet
Explanation:
In Computer science, Firewall implementation and design for an enterprise can be a daunting task. Choices made early in the design process can have far-reaching security implications for years to come.
Screened subnet firewall architecture is designed to host servers that offer public services.
In network security and management, one of the network architecture used by network engineers for the prevention of unauthorized access of data on a computer is a screened subnet. A screened subnet can be defined as a network architecture that uses a single firewall with three screening routers as a firewall.
<em>A screened subnet is also known as a triple-homed firewall, this is because it has three (3) network interfaces;</em>
1. Interface 1: it is known as the external or access router, which is a public interface and connects to the global internet.
2. Interface 2: it is known as the demilitarized zone or perimeter network, which acts as a buffer and hosted public servers (bastions host) are attached herein.
3. Interface 3: it is known as the internal router, which is a subnet that connects to an intranet.
<em>The screened subnet when properly configured helps to prevent access to the internal network or intranet. </em>
Explanation:
def letterDigitCount(j):
dic={"digits":0,"letters":0}
for a in j:
if a.isdigit():
dic["digits"]+=1
elif a.isalpha():
dic["letters"]+=1
return dic
