Networking Fundamentals Flashcards

7 cards from real CCST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Networking Fundamentals flashcards as text

Which protocol operates at the Transport layer and provides connection-oriented, reliable data delivery?
Answer: TCP
TCP (Transmission Control Protocol) uses a three-way handshake, sequencing, and acknowledgments to ensure reliable, ordered data delivery.
What is the well-known port number used by HTTPS?
Answer: 443
HTTPS (HTTP Secure) uses TCP port 443 to provide encrypted web communications via TLS/SSL.
Which device operates at Layer 1 of the OSI model and simply regenerates electrical signals?
Answer: Repeater
A repeater operates at the Physical layer, amplifying and regenerating signals to extend the distance of a network segment without inspecting traffic.
What type of address is FF:FF:FF:FF:FF:FF?
Answer: Broadcast MAC address
FF:FF:FF:FF:FF:FF is the Layer 2 broadcast MAC address, causing all devices on a LAN segment to receive and process the frame.
Which wireless standard operates exclusively in the 5 GHz band and offers speeds up to 3.5 Gbps?
Answer: 802.11ac
802.11ac (Wi-Fi 5) operates only in the 5 GHz band and achieves theoretical speeds up to 3.5 Gbps using MU-MIMO and wider channels.
A user can ping a server by IP but not by hostname. Which service is most likely failing?
Answer: DNS
DNS (Domain Name System) translates hostnames to IP addresses; if name resolution fails, connectivity by hostname fails even though IP-level connectivity works.
What is the function of a default gateway?
Answer: Forward traffic destined for remote networks
The default gateway is a router interface that forwards packets from the local network to remote networks when no more-specific route exists.