Aruba Associate Networking Fundamentals

Question 1

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

Accepted Answer

Route traffic between different networks

Answer

A router is a network device that operates at Layer 3 (Network Layer) of the OSI model. Its primary function is to forward data packets between different computer networks, such as a local area network (LAN) and the internet. Routers use IP addresses to determine the best path for data to travel, enabling communication across diverse network segments and the global internet.

Question 2

Which device is responsible for segmenting a network into separate collision domains?

Accepted Answer

Switch

Answer

A network switch operates at Layer 2 (Data Link Layer) of the OSI model and is designed to segment a network into separate collision domains. Unlike hubs, which broadcast data to all connected devices, a switch forwards data only to the intended recipient's port. This intelligent forwarding significantly reduces collisions and improves network performance by creating dedicated communication paths for each connected device.

Question 3

Which layer of the OSI model is responsible for end-to-end communication?

Accepted Answer

Transport

Answer

The Transport Layer (Layer 4) of the OSI model is responsible for end-to-end communication between applications on different hosts. It ensures reliable data transfer through services like segmentation, reassembly, error checking, and flow control. Protocols like TCP and UDP operate at this layer to manage the delivery of data from a source application to a destination application, guaranteeing data integrity and order.

Question 4

What is a characteristic of a MAC address?

Accepted Answer

Assigned by the manufacturer

Answer

A MAC (Media Access Control) address is a unique hardware identifier assigned to a network interface controller (NIC) by its manufacturer. This physical address is burned into the device's firmware and is used at the Data Link Layer (Layer 2) of the OSI model to uniquely identify a device within a local network segment. Unlike IP addresses, MAC addresses are generally permanent and do not change, serving as a device's unique hardware fingerprint.

Question 5

Which IP address class provides the most host addresses?

Accepted Answer

Class A

Answer

Class A IP addresses are designed for very large networks, allocating 8 bits for the network portion and 24 bits for the host portion. This configuration allows for approximately 16 million unique host addresses per network. This significantly larger host address space, compared to Class B or Class C, makes Class A the class that provides the most host addresses.

(ACA) Aruba Certified Associate Certification Practice Test

(ACA) Aruba Certified Associate Certification Practice Test

Aruba Associate Networking Fundamentals