Wireless Networking
Wireless networks typically operate on these two frequency bands.
What are 2.4 GHz and 5 GHz?
Internet speed is measured in these units.
What are megabits per second (Mbps)?
This extra bit is added to data to ensure that the number of 1s in the data remains either even or odd.
What is a parity bit?
This method of communication breaks data into packets and sends them separately across a network.
What is packet switching?
This protocol ensures reliable communication by retransmitting lost packets.
What is TCP (Transmission Control Protocol)?
This encryption standard is currently the most secure for protecting wireless networks.
What is WPA3 (Wi-Fi Protected Access 3)? What is a block diagram?
Too many devices or excessive data usage on a network can lead to this performance issue.
What is network congestion?
This method calculates a numerical value based on transmitted data and compares it on the receiving end to check for errors.
What is a checksum?
This network device directs packets between different networks using IP addresses.
What is a router?
This connectionless protocol is often used for streaming video and online gaming.
What is UDP (User Datagram Protocol)?
This cyberattack occurs when a hacker secretly intercepts communications between two parties on an unsecured network.
What is a man-in-the-middle attack?
This networking feature allows routers to prioritize traffic for high-importance applications like video calls.
What is Quality of Service (QoS)?
This happens when an error is detected in a TCP transmission.
What is packet retransmission?
The two key factors that affect network performance are the maximum data transfer rate and the time delay between transmission and reception.
What are bandwidth and latency?
This protocol encrypts web traffic to protect data from eavesdropping.
What is HTTPS (Hypertext Transfer Protocol Secure)?
This security feature allows only pre-approved devices to connect to a Wi-Fi network by checking their unique network addresses.
What is MAC address filtering?
A slow component in a network that reduces the overall speed of data flow is known as this.
What is a bottleneck?
This error correction method adds redundant data to the transmission, allowing the receiver to fix errors without requesting retransmission.
What is Forward Error Correction (FEC)?
This process occurs when packets arrive in the wrong order, requiring TCP to reconstruct the message.
What is packet reassembly?
These three protocols handle email transmission and retrieval.
What are SMTP, POP3, and IMAP?
These three strategies can help reduce Wi-Fi interference in homes and businesses. The part of the CPU that stores all the memory addresses of the data
What are changing the Wi-Fi channel, using a wired connection for high-traffic devices, and moving the router to a central location?
This distributed system of servers speeds up website performance by storing cached content closer to users.
What is a Content Delivery Network (CDN)?
This powerful error-checking technique is used in Ethernet networks and data storage systems to detect corruption.
What is Cyclic Redundancy Check (CRC)?
This three-step process is used by TCP to establish a reliable connection before data transmission begins.
What is the three-way handshake (SYN → SYN-ACK → ACK)?
This four-layer networking model is the foundation of the modern internet.
What is the TCP/IP model?