Section 1 Practice Test - Networking concepts

What does Layer 1 of the OSI model handle?

It defines how data is encoded, transmitted, and received over physical media 

Which of the following is the main function of layer 2, in the OSI model?

It handles error detection and correction and manages physical addressing

What is the primary responsibility of Layer 3 in the OSI model?

It assigns IP addresses to devices and handles packet routing between networks

What is the main role of layer 4 in the OSI model?

It provides reliable data delivery and manages flow control

Which of the following is the primary function of Layer 5 in the OSI model?

It maintains and controls the communications between applications

What is the main purpose of Layer 6 in the OSI model?

It provides encryption, compression and translation of data formats

Which layer of the OSI model is responsible for providing network services to end-user applications?

Layer 7 - Application 

What is the primary function of a router in a network?

To route data packets between different networks based on IP addresses

What is the main function of a switch in a network?

To forward data packets within the same network based on MAC addresses

What is the Primary role of a firewall in network security?

To prevent unauthorized access and monitor incoming and outgoing traffic based on security policies 

What is the primary function of an IDS?

To detect and alert on potential security threats in real-time

What is the main difference between IDS and IPS?

An IDS only detects threats, while an IPS detects and blocks threats in rea-time

What is the purpose of a load balancer in a network?

To distribute incoming network traffic across multiple servers to ensure optimal resource usage

What is the role of a proxy in network security?

To act as an intermediary between clients and servers, often to filter content and provide anonymity

What does NAS provide in a network?

A centralized storage system that allows data access and file sharing over the network

What is the primary function of a SAN?

To provide centralized, high-speed storage access over a networ

What is the purpose of wireless technology in networking?

To allow devices to communicate over the air without physical connections

What does an AP do in a wireless network?

It connects wired devices to the wireless network

What is the role of a controller in a wireless network?

It acts as a central point of management for multiple access points and devices 

What is the purpose of applications in a network?

To provide specific functionalities for end-users of devices within a network

What is the roll of a CDN

To distribute content like images and videos to users based on geographic location 

What is the primary function of a VPN?

To enable secure connections between remote users and a private network

What does QoS ensure in a network?

It prioritizes network traffic to ensure high-quality service for critical applications like voice and video

What does TTL represent in Networking?

The maximum number of hops or routers a packet can traverse before being discarded

What does NFV provide in a network environment?

It virtualizes network infrastructure services, such as firewalls and routers, to reduce hardware dependencies

What is a VPC?

A private network hosted within a public cloud infrastructure, allowing for secure and isolated network resources

What is the role of network security groups in cloud environments?

To define rules that allow or deny network traffic to virtual machines based on security policies

What is the function of network security lists in cloud environments?

To define a list of IP addresses allowed or denied access to cloud resources

What does a cloud gateway do in a cloud environment?

It connects a private network to a public cloud, allowing secure communication between them

What is the role of an internet gateway in a cloud network?

It allows communication between a virtual private cloud and the internet

What does a NAT gateway do in a cloud environment?

It allows multiple devices in a private network to share a single public IP address for internet access

What is the purpose of VPN in cloud connectivity?

To create a secure, encrypted connection between a private network and a cloud service over the internet

What does Direct Connect provide in cloud connectivity?

A dedicated, high-speed, low-latency connection between an on-premises data center and a cloud provider

What is the primary characteristic of a public cloud deployment model?

It is hosted by a third-party provider and shared among multiple customers

What is the main feature of a private cloud deployment model?

It is dedicated to a single organization and managed internally or by a third-party service provider

What is the primary advantage of a hybrid cloud deployment model?

It combines private and public cloud features for greater flexibility and scalability

What is the main characteristic of SaaS

It offers complete software applications hosted by a third-party provider

What is the main feature of IaaS

It offers virtualized computing resources like servers, and networking over the cloud

What is the primary function of PaaS?

To offer a platform for developers to build, run, and deploy applications without managing underlying infrastructures 

What is meant by scalability in cloud computing?

The ability to handle increased workload by adding more resources to the system without compromising performance

What is elasticity in cloud computing?

The ability to automatically scale resources up or down based on demand 

What is multitenancy in cloud computing?

The ability of a single instance of a cloud service to serve multiple customers, each with isolated resources