CompTIA Network+
The **CompTIA Network+** certification validates the technical skills needed to securely establish, maintain and troubleshoot essential business networks.
Which OSI model layer is responsible for IP packet routing?
Answer : Layer 3 (Network).
The Network layer handles logical addressing and data routing across different networks.
Which protocol is used to automatically assign IP addresses to devices on a network?
Answer : DHCP (Dynamic Host Configuration Protocol).
DHCP automates IP configuration for hosts, avoiding manual configuration errors and address conflicts.
Which network topology connects all devices to a central point like a switch?
Answer : Star Topology.
This is the most common topology today. If a cable fails, only that device is disconnected, unlike a bus topology.
Which command-line tool tests connectivity between two hosts by measuring response time?
Answer : `ping`.
Ping uses ICMP Echo Request messages to verify if a remote machine is reachable and measure latency.
What is the default subnet mask for a Class C IP address?
Answer : 255.255.255.0.
In CIDR notation, this is /24, allowing for 254 usable hosts on the subnet.
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