CompTIA Network+ Certification Video Course
PowerCert Animated Videos・2 minutes read
The star, bus, ring, mesh, and hybrid topologies offer different network layouts with varying advantages and disadvantages, while network connectors like RJ-45 and fiber optic connectors serve specific purposes in different setups. Understanding different cables, protocols, and troubleshooting tools is essential for effective network administration and problem-solving in various network configurations.
Insights
- Star topology connects all computers to a central point like a hub or switch, ensuring individual cable connections for each device but making all computers vulnerable if the central hub fails.
- Mesh topology connects every computer to each other for high redundancy but can be costly due to extensive cabling, commonly used in wide area networks like the internet.
- Point-to-point topology directly connects two hosts using a single cable, while client-server topology involves clients connecting to a centralized server for resource access, simplifying administration.
- Firewalls prevent unauthorized access by filtering incoming information, while Access Control Lists in firewalls determine network access based on set rules.
- Switches direct data packets only to the intended destination port, reducing unnecessary network traffic compared to hubs, and come in passive or active types.
- IP addresses are divided into classes A, B, and C, with private IP addresses starting with 10, 172, and 192, used within local networks, and subnetting involves breaking down large networks into smaller subnets for better management.
Get key ideas from YouTube videos. It’s free
Recent questions
What is a star network topology?
A star network topology is a common layout where all computers connect to a central point like a hub or switch, ensuring data passes through this central point. If one computer fails, others remain unaffected due to individual cable connections, but if the central hub fails, all connected computers are impacted.
What is the difference between a hub and a switch?
Hubs copy data packets to all ports, leading to all devices receiving the data, while switches direct data packets only to the intended destination port, reducing unnecessary network traffic compared to hubs. Switches are intelligent, learning and storing physical addresses of connected devices.
How does DHCP work in network setups?
DHCP servers assign IP addresses to computers from a range of consecutive IP addresses called a scope. Lease duration is the time an IP address is assigned to a computer, with reservations ensuring specific devices always receive the same IP address. DHCP servers automatically renew IP addresses for computers.
What is the purpose of firewalls in networks?
Firewalls prevent unauthorized access to private networks by filtering incoming information from the internet, blocking unwanted traffic, and permitting wanted traffic. Access Control Lists (ACL) in firewalls determine what can access the network, either allowing or denying permission based on set rules.
What are the characteristics of fiber optic cables?
Fiber optic cables use pulses of light to send data, with single-mode fiber allowing light at a single angle for long distances, and multimode fiber reflecting light off cable walls for short distances. Different fiber optic connectors like MTRJ, ST, LC, and SC are utilized for high-density connections, with UPC and APC connectors differing in signal loss reduction due to their connection angles.
Related videos
yacklyon
CURSO de REDES 2020 para PRINCIPIANTES # 2 📡 TOPOLOGÍAS
FiberNinja
#019: Small Office / Big Cabling Rehab!!
PowerCert Animated Videos
Ethernet Cables, UTP vs STP, Straight vs Crossover, CAT 5,5e,6,7,8 Network Cables
Professor Messer
Copper Cabling - N10-008 CompTIA Network+ : 1.3
Crosstalk Solutions
01 - Introduction to Home Networking - Home Networking 101