Cisco
Which impact does adding a Layer 2 switch have on a network?
Adding a Layer 2 switch gives every port its own collision domain, enables full-duplex traffic and VLANs, and lifts LAN performance, security and scalability.
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Cisco
Cisco
Which Type of QoS Marking is Applied to Ethernet Frames?
Ethernet frames carry QoS priority through IEEE 802.1p Class of Service in the VLAN tag. Learn the CoS values 0-7 and how they differ from Layer 3 DSCP.
Cisco
Peer-to-Peer (P2P): eDonkey, eMule, BitTorrent, Bitcoin and LionShare
eDonkey, eMule, BitTorrent, Bitcoin and LionShare all run on a peer-to-peer (P2P) networking model. How pure, hybrid and structured P2P designs differ.
Cisco
LLC Sublayer Functions: How It Facilitates Ethernet Communication
The LLC sublayer links the network layer to the MAC sublayer, identifying Layer 3 protocols and providing flow and error control for Ethernet communication.
Cisco
Which Expansion Slot is Used by an NVMe Compliant Device?
Which expansion slot does an NVMe device use? NVMe SSDs run over PCIe, usually in an M.2 slot or on a PCIe add-in card. Here is how they differ.
Cisco
What data encoding technology is used in copper cables?
Copper cables encode data with Manchester, 4B/5B, 8B/10B and PAM-5 schemes to keep signals clean over distance. Learn how each works and where Ethernet uses it.
Cisco
What Is One Limitation Of A Stateful Firewall?
A stateful firewall tracks connection states but cannot inspect application-layer traffic, so attacks hidden inside allowed sessions can pass straight through.
Cisco
Which Data Encoding Technology is Used in Fiber-Optic Cables?
Fiber-optic cables carry data as light, so encoding schemes like NRZ, RZ, 4B/5B, 8B/10B and PAM4 matter. How each works, and why CCNA 200-301 tests them.
CompTIA
Which statement describes a characteristic of SRAM in a PC?
SRAM is the fast, no-refresh memory used for CPU cache in a PC. See how SRAM differs from DRAM in speed, cost, power, and capacity for CompTIA A+.
Cisco
Which Statement Describes IPV4 Addressing?
Which statement describes IPv4 addressing? 32-bit dotted-decimal addresses, classes, private ranges, and subnet masks, explained for CCNA candidates.
Cisco
What is an advantage of configuring a Cisco router as a relay agent?
Configuring a Cisco router as a DHCP relay agent lets one central server serve many subnets. The advantages of the relay agent model, explained.
Google
Google Looker Certification: Complete 2025 Guide
A practical guide to Google Looker certification: the analyst and LookML developer tracks, the core skills that matter, and a hands-on study roadmap.
Cisco
Where Would a Technician Use an RG-6 Cable?
RG-6 is the coaxial cable technicians reach for in cable TV, satellite, and broadband installs. See where RG-6 is used and how it compares with RG-59 and RG-11.
Cisco
Match The TCP/IP Model Layer To The Function
Match the TCP/IP layers to their functions — Application, Transport, Internet, and Network Access — with protocols, CCNA 200-301 relevance, and questions.
Cisco
What is correct in relation to NAT for IPv6?
What is correct about NAT for IPv6? Why IPv6 rarely needs NAT, how NAT64 links IPv6 and IPv4 networks, and the key points CCNA 200-301 tests.
CompTIA
DNS Spoofing: The Attack That Redirects Users to Fake Sites
DNS spoofing (cache poisoning) plants falsified DNS records to redirect users to malicious sites. Learn how it works, how to stop it, and why SY0-701 tests it.
Cisco
Which Device Can Control And Manage A Large Number Of Corporate APS?
A wireless LAN controller (WLC) centrally controls and manages large numbers of corporate APs, pushing configuration, security policies and updates at scale.
Cisco
What is a Disadvantage of Deploying a Peer-to-Peer Network Model?
Peer-to-peer networks lack central security, scale poorly, and make backup and monitoring difficult. The key disadvantages of the P2P model explained.
Cisco
Which Motherboard Bus Connects the CPU to RAM and Other Components?
The memory bus (once the front-side bus) links the CPU to RAM. Learn how FSB, memory buses, QPI, and Infinity Fabric move data on a motherboard.
CompTIA
802.1X Supplicant: Which Device Is the Supplicant?
In 802.1X, the supplicant is the client device requesting network access. It presents credentials through the authenticator to a RADIUS server. SY0-701 topic.
Cisco
Match the Spanning-Tree Feature with the Protocol Type
Match each spanning-tree feature to the right protocol type: 802.1D STP, PVST+, Rapid PVST+, and MST, with the feature differences that matter for 200-301.