CCNA اسئلة واجوبة المقابلات
سؤال 21. Explain the concept of VLAN (Virtual Local Area Network).
VLANs logically segment a network into smaller broadcast domains, improving performance and security by isolating traffic.
سؤال 22. What is the role of a router in a network?
A router connects different networks and directs data between them based on IP addresses. It operates at the network layer (Layer 3) of the OSI model.
سؤال 23. What is the difference between a hub, switch, and router?
A hub operates at the physical layer, a switch at the data link layer, and a router at the network layer. Routers connect networks, switches forward data within a network, and hubs broadcast data to all connected devices.
سؤال 24. What is NAT (Network Address Translation) and why is it used?
NAT allows multiple devices on a local network to share a single public IP address, providing security and conserving IP addresses.
سؤال 25. Explain the purpose of ICMP (Internet Control Message Protocol).
ICMP is used to send error messages and operational information about network conditions. It is commonly used for troubleshooting.
الاكثر فائدة حسب تقييم المستخدمين:
- What is the purpose of ARP (Address Resolution Protocol)?
- Explain the purpose of the DHCP (Dynamic Host Configuration Protocol).
- What is the role of a router in a network?
- What is the purpose of the subnet mask in networking?
- What is the difference between static routing and dynamic routing?