Answer:
The answer is "option d".
Explanation:
UML stands for Unified Modeling Language. It is an OOPs based language that is used to design a graphic by software developers. This language can also be used to build diagrams and provide some tools to ready-to-use, interactive templates for users and other options are not correct that can be described as:
- In option a, The Top-down approach is not followed by UML.
- In option b, UML uses an object-oriented programming language that follows a bottom-up approach. It refers to a style of programming.
- In option c, It does not use structured programming because it uses procedural languages.
Its TRUE firewalls filters traffic
Firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.Firewall typically establishes a barrier between a trusted internal network and untrusted external network such as the internet.
Answer:
Option B: DNS
Explanation:
Domain Name Server (DNS) is analogous to a phone book where people can look up a person name through numerical phone number. A DNS server is a database that host a database of public IP addresses (e.g. 64.233.160.0) and their associated hostname (e.g. google.com).
Whenever we type domain name in the address bar of our browser (e.g. google.com), that domain will be delivered to DNS server. Inside DNS server the URL will be mapped with its corresponding IP address making it possible for the web request to reach the the target server.
