Routing & Switching Basics (CCST Networking) Flashcards
Cisco CCST Networking 100-150 Flashcards

| Front | Back |
| How are VLAN IDs numbered | Range from 1 to 4094 with some reserved IDs |
| How does EtherChannel work | Bundles multiple physical links into one logical link for increased bandwidth and redundancy |
| What are STP port states | Blocking Listening Learning Forwarding and Disabled |
| What happens when a switch receives a frame with unknown destination MAC | Switch floods frame out all ports in VLAN except the ingress port |
| What is 802.1Q | Common VLAN tagging standard that inserts a VLAN tag into Ethernet frames |
| What is a BPDU | Bridge Protocol Data Unit used by STP to exchange information between switches |
| What is a broadcast domain | Set of devices that receive broadcast frames separated by routers or VLANs |
| What is a broadcast storm | Excessive broadcast traffic that can overwhelm network devices often caused by loops |
| What is a CAM table | Table on a switch storing MAC to port associations used for forwarding |
| What is a collision domain | Network segment where frames can collide typically a single Ethernet hub or half duplex link |
| What is a default gateway | IP address where hosts send traffic destined for other networks |
| What is a default gateway for a switch | IP of router or layer3 device used by switch for management traffic |
| What is a default route | Route used when no specific route to destination exists commonly 0.0.0.0 slash 0 |
| What is a designated port in STP | Port selected to forward frames on a network segment |
| What is a directly connected route | Route to network learned from a local interface with no next hop |
| What is a dynamic route | Route learned and maintained automatically by a routing protocol |
| What is a management VLAN | VLAN used to access and manage network devices separate from user traffic |
| What is a metric in routing | Value used by routing protocols to choose best path like hop count or cost |
| What is a root port in STP | Port on non root switch with lowest path cost to the root bridge |
| What is a routing table entry | Destination network mask next hop or outgoing interface and metric |
| What is a static route | Manually configured route specifying destination and next hop or exit interface |
| What is a VLAN | Logical broadcast domain grouping ports even across switches |
| What is administrative distance | Trustworthiness value used to prefer one route source over another |
| What is administrative distance of a connected route | Typically zero indicating highest trust |
| What is ARP | Protocol that maps IPv4 addresses to MAC addresses on a LAN |
| What is ARP cache timeout | Time an ARP entry is kept before refreshing varies by OS typically minutes |
| What is convergence in routing | Time it takes for routers to agree on network topology after a change |
| What is distance vector routing | Protocol type that advertises routes to neighbors using metrics like hop count |
| What is frame flooding | Behavior when destination MAC not in MAC table causing transmission to all ports in VLAN |
| What is inter VLAN routing | Routing traffic between different VLANs usually at a layer 3 device |
| What is LACP | Link Aggregation Control Protocol standard for negotiating EtherChannel dynamically |
| What is link state routing | Protocol type that builds complete network map using LSAs like OSPF |
| What is MAC learning | Switch builds MAC table mapping source MAC addresses to ingress ports |
| What is NAT basic purpose | Translate private addresses to public addresses for Internet access |
| What is OSPF | Link state routing protocol that uses areas and cost metrics for scalable routing |
| What is portfast or edge port | STP feature that moves port immediately to forwarding state for end devices |
| What is proxy ARP | Router replies to ARP for another host so hosts can communicate without route changes |
| What is RIP | Simple distance vector protocol using hop count with maximum 15 hops |
| What is route poisoning | Technique to mark failed routes with infinite metric to prevent loops |
| What is route summarization | Aggregating multiple networks into a single route to reduce routing table size |
| What is Spanning Tree Protocol STP | Prevents layer 2 loops by blocking redundant switch ports |
| What is split horizon | Mechanism preventing route updates from being sent back to the interface they came from |
| What is STP path cost | Value assigned to links used to choose best path to root bridge |
| What is the native VLAN | VLAN that sends untagged frames on an 802.1Q trunk |
| What is the STP root bridge | Switch elected based on lowest bridge ID that is reference point for path selection |
| What is trunking | Carry multiple VLANs over a single link between switches |
| What is VLAN tagging | Adding VLAN identifier to frames so multiple VLANs share a link |
| Why use VLANs | Segment traffic to improve security and reduce broadcast traffic |
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About the Flashcards
Flashcards for the Cisco CCST Networking exam guide you through essential networking foundations, from how switches learn MAC addresses to the difference between collision and broadcast domains. Quickly recall concepts like CAM tables, frame flooding, VLAN segmentation, trunking with 802.1Q tags, and the role of the native VLAN. The deck then moves into Layer-3 skills such as default gateways, static and dynamic routes, administrative distance, and metrics used by RIP and OSPF. You will also practice NAT translation steps, ARP variations, Spanning Tree operations, EtherChannel with LACP, and techniques like split horizon, route poisoning, and summarization-key ideas needed for confident exam performance.
Topics covered in this flashcard deck:
- Ethernet switching & MAC learning
- VLANs and trunking
- Routing fundamentals & protocols
- Spanning Tree & EtherChannel
- NAT and ARP operations