Cisco
What Does the Term Attenuation Mean in Data Communication?
Attenuation is the loss of signal strength as data travels through a medium. Learn its causes, its effects on performance, and how to reduce it.
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Cisco
Cisco
Which Protocol Does Ping Use to Test Connectivity Between Hosts?
Ping uses ICMP to test connectivity between network hosts, sending echo requests and measuring round-trip time. Learn how ICMP works, its uses, and its limits.
Cisco
What Term Is Used to Describe Dual-Sided Printing?
Duplex printing is the term for printing on both sides of a sheet. Learn simplex vs. duplex, automatic vs. manual duplexing, and why it matters in networking.
Cisco
What is Used on WLANS to Avoid Packet Collisions?
WLANs avoid packet collisions with CSMA/CA, backed by RTS/CTS, DCF, PCF, and NAV. See how each mechanism works and how it differs from wired CSMA/CD.
Cisco
TCP/IP Application Layer Protocols: Which Three Are in the Suite?
HTTP/HTTPS, FTP, and DNS are three application layer protocols of the TCP/IP suite. Learn what each one does, its ports, and why CCNA 200-301 tests them.
CompTIA
What is The Benefit of Using a Stateful Firewall in a Network?
A stateful firewall tracks active connections and blocks traffic that doesn't match a known session. Learn the benefits for SY0-701 network security.
Cisco
What is a Characteristic of the UDP Protocol?
UDP is connectionless: no handshake, no guaranteed delivery, and minimal overhead. Learn the key characteristics of UDP and when it is preferred over TCP.
Cisco
What Is the Purpose of a Cisco Router's Startup Configuration File?
The startup configuration file on a Cisco router lives in NVRAM and loads at boot, so saved settings survive reboots. See how it differs from running-config.
Cisco
Match Typical Linux Log Files to The Function.
Match typical Linux log files to their functions: auth.log for logins, syslog, kern.log, cron and audit.log, explained for CCNA Cyber Ops candidates.
Cisco
Which Hard Drive Task Is Part of a Preventive Maintenance Plan?
The classic A+ hard drive maintenance task is ensuring data and power cables are firmly connected, backed by S.M.A.R.T. checks, filesystem care, and backups.
Cisco
Which Two Functions Are Primary Functions Of A Router? (Choose Two.)
A router's two primary functions are packet forwarding and path selection. Learn how each one works and why both are core CCNA 200-301 exam topics.
Cisco
Which Statement Describes Cybersecurity?
Which statement describes cybersecurity? The practice of defending computers, networks and data from malicious attacks, explained for CCNA 200-301.
Cisco
Which Layer Receives Bits From the Physical Layer?
The physical layer passes bits up to the data link layer on the receiving device. Follow the handoff step by step, from framing to CRC checks and MAC addresses.
Cisco
What Is Indicated By The Term Throughput?
Throughput is the actual data transfer rate a network delivers, not its maximum bandwidth. Learn what affects it, how to measure it, and how to improve it.
Cisco
Cisco IOS Zone-Based Policy Firewall Operation, Explained
Cisco IOS zone-based policy firewall assigns interfaces to security zones and controls traffic between them with inspect, pass, or drop actions.
Cisco
What is a Function of OSPF Hello Packets?
OSPF Hello packets discover neighbors, maintain adjacencies, and carry the parameters routers must match before they can exchange routes in a network.
Cisco
OSI Model: Three Layers That Map to TCP/IP's Application Layer
Three OSI layers, Application, Presentation and Session, merge into the single TCP/IP Application layer. Learn the mapping and the CCNA traps.
Cisco
What Is Considered The Most Effective Way To Mitigate A Worm Attack?
Worm attack mitigation: patching is the single most effective defense. See how segmentation, firewalls, IDS/IPS and training layer up, CCNA-style.
Cisco
Which Switch Becomes the Root Bridge? STP Election Explained
The root bridge is the switch with the lowest bridge ID — priority first, then MAC address. Worked election example and common exam traps inside.
Cisco
Which Two Functions Are Primary Functions of a Router?
A router's two primary functions are packet forwarding and path selection. See how each works, plus secondary roles like NAT, ACLs, and QoS, for CCNA 200-301.
Cisco
Which Cloud Model Serves a Single Organization or Entity?
The private cloud is the model built for one specific organization. Compare public, private, hybrid, and community clouds, with benefits and use cases.