CCST CCST Network Devices & Infrastructure 2 — Questions and Answers
Question 1: What is the purpose of a VLAN (Virtual Local Area Network)?
- To extend wireless coverage across a building
- To logically segment a physical network into separate broadcast domains (Correct answer)
- To provide redundancy for uplink ports
- To assign static IP addresses to devices
Correct answer: To logically segment a physical network into separate broadcast domains
VLANs logically divide a single physical switched network into multiple isolated broadcast domains, improving security, performance, and network management.
Question 2: What is the difference between an access port and a trunk port on a Cisco switch?
- An access port carries multiple VLANs; a trunk port carries only one VLAN
- An access port carries traffic for a single VLAN; a trunk port carries traffic for multiple VLANs using 802.1Q tagging (Correct answer)
- An access port connects to routers; a trunk port connects to end hosts
- An access port uses fiber; a trunk port uses copper
Correct answer: An access port carries traffic for a single VLAN; a trunk port carries traffic for multiple VLANs using 802.1Q tagging
An access port carries untagged traffic for a single VLAN (typically connected to end devices), while a trunk port carries tagged traffic for multiple VLANs using 802.1Q encapsulation.
Question 3: Which protocol does a Cisco router use by default to dynamically learn routes from other Cisco routers in an enterprise network?
- RIP
- OSPF
- EIGRP (Correct answer)
- BGP
Correct answer: EIGRP
EIGRP (Enhanced Interior Gateway Routing Protocol) is Cisco's proprietary advanced distance-vector routing protocol, commonly deployed by default in Cisco enterprise networks.
Question 4: What is the function of the Cisco IOS 'show interfaces' command?
- Displays the routing table
- Displays interface status, error counters, speed, duplex, and traffic statistics (Correct answer)
- Shows active VLAN assignments
- Lists all connected CDP neighbors
Correct answer: Displays interface status, error counters, speed, duplex, and traffic statistics
The 'show interfaces' command displays detailed information about each interface including operational status, error counters, bandwidth, speed, duplex settings, and traffic statistics.
Question 5: What type of cable is required to directly connect two switches together without an uplink port?
- Straight-through cable
- Rollover cable
- Crossover cable (Correct answer)
- Coaxial cable
Correct answer: Crossover cable
A crossover cable crosses the transmit and receive pairs, allowing two like devices (switch-to-switch) to communicate directly; modern switches with Auto-MDIX detect this automatically.
Question 6: Which Cisco feature automatically negotiates the correct cable type (straight-through or crossover) needed for a connection?
- Auto-MDIX (Correct answer)
- EtherChannel
- LACP
- CDP
Correct answer: Auto-MDIX
Auto-MDIX (Automatic Medium-Dependent Interface Crossover) automatically detects and configures the correct transmit/receive pair orientation, eliminating the need for crossover cables.
CCST CCST Network Devices & Infrastructure 2
What is the purpose of a VLAN (Virtual Local Area Network)?