Domain 2.0 Flashcards
Question:
What is the purpose of a VLAN in a network?
Answer Options:
To connect devices across different physical networks.
To logically segment a network into separate broadcast domains.
To assign IP addresses dynamically.
To encrypt data transmitted between switches.
Correct Answer + Explanation:
To logically segment a network into separate broadcast domains.
VLANs allow devices on the same physical switch to operate in isolated logical networks, improving organization and reducing unnecessary traffic.
Practical Use:
A company creates separate VLANs for HR, IT, and Finance departments to ensure secure and efficient traffic segmentation.
Why Others Are Incorrect:
Connecting devices across physical networks is a router’s function.
IP assignment is handled by DHCP.
Encryption is managed by specific protocols, not VLANs.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
How do VLANs improve scalability in large networks?
What device is commonly used to connect multiple VLANs?
Answer Options:
Switch.
Router or Layer 3 switch.
Access point.
Firewall.
Correct Answer + Explanation:
Router or Layer 3 switch.
Routers or Layer 3 switches enable communication between VLANs by routing traffic across different network segments.
Practical Use:
A Layer 3 switch routes traffic between VLAN 10 (Finance) and VLAN 20 (HR) for shared resources like a printer.
Why Others Are Incorrect:
Switches operate at Layer 2 and cannot route traffic.
Access points handle wireless communication, not VLAN routing.
Firewalls enforce security policies but don’t route VLAN traffic.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What are the differences between a Layer 3 switch and a router?
Question:
What is trunking in VLAN configurations?
Answer Options:
Assigning IP addresses to VLANs.
Combining multiple VLANs over a single physical link.
Encrypting VLAN traffic for secure transmission.
Routing traffic between different VLANs.
Correct Answer + Explanation:
Combining multiple VLANs over a single physical link.
Trunking allows multiple VLANs to share the same physical connection between switches using tagging protocols like IEEE 802.1Q.
Practical Use:
A trunk link between two switches carries traffic for VLANs 10, 20, and 30 simultaneously.
Why Others Are Incorrect:
IP assignment is unrelated to trunking.
Encryption and inter-VLAN routing are separate functions.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What is the purpose of the native VLAN in a trunk link?
Question:
What is the role of a wireless controller in enterprise networks?
Answer Options:
To assign static IP addresses to devices.
To centralize the management of multiple access points.
To route traffic between wired and wireless networks.
To encrypt wireless communication.
Correct Answer + Explanation:
To centralize the management of multiple access points.
Wireless controllers allow administrators to configure, monitor, and optimize access points from a single interface.
Practical Use:
A university uses a wireless controller to adjust access point settings across campus for optimal coverage.
Why Others Are Incorrect:
IP assignment is handled by DHCP.
Routing and encryption are separate tasks.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
How do wireless controllers improve network scalability in large deployments?
Question:
What is the purpose of using PoE (Power over Ethernet) in a network?
Answer Options:
To deliver both power and data over the same Ethernet cable.
To prioritize data packets for critical applications.
To encrypt Ethernet traffic during transmission.
To dynamically assign IP addresses to devices.
Correct Answer + Explanation:
To deliver both power and data over the same Ethernet cable.
PoE simplifies installations by powering devices like IP cameras and access points without requiring separate power sources.
Practical Use:
An office uses PoE switches to power security cameras and wireless access points, reducing cabling requirements.
Why Others Are Incorrect:
Packet prioritization and encryption are unrelated to PoE.
IP assignment is a DHCP function.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What are the differences between PoE and PoE+ standards?
Question:
What is the function of a DHCP server in a network?
Answer Options:
Assigning MAC addresses to devices.
Dynamically allocating IP addresses to devices.
Routing traffic between VLANs.
Encrypting data for secure communication.
Correct Answer + Explanation:
Dynamically allocating IP addresses to devices.
A DHCP server automatically assigns IP addresses, subnet masks, and other configurations, simplifying device setup.
Practical Use:
A DHCP server assigns IP addresses to all devices in a network, ensuring no manual configuration is required.
Why Others Are Incorrect:
MAC addresses are fixed hardware identifiers.
VLAN routing and encryption are unrelated to DHCP.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
How does a DHCP lease work, and what happens when it expires?
Question:
What is the purpose of a static route in a network?
Answer Options:
To dynamically update routing tables based on network changes.
To manually define a specific path for traffic to a destination network.
To encrypt data packets during transmission.
To assign IP addresses to connected devices.
Correct Answer + Explanation:
To manually define a specific path for traffic to a destination network.
Static routes are manually configured to direct traffic to a specific destination, useful for small networks or backup paths.
Practical Use:
A small business sets up a static route to send traffic to a secondary ISP for redundancy.
Why Others Are Incorrect:
Dynamic updates are managed by routing protocols like OSPF or RIP.
Encryption and IP assignment are unrelated to static routes.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What are the advantages and disadvantages of static routing compared to dynamic routing?
Question:
What type of cable is typically used to connect devices within a LAN?
Answer Options:
Fiber optic cable.
Twisted pair Ethernet cable (e.g., Cat5e or Cat6).
Coaxial cable.
Serial cable.
Correct Answer + Explanation:
Twisted pair Ethernet cable (e.g., Cat5e or Cat6).
Twisted pair cables are widely used for LAN connections due to their balance of cost, performance, and ease of use.
Practical Use:
An office connects computers and printers to a network switch using Cat6 Ethernet cables for fast, reliable communication.
Why Others Are Incorrect:
Fiber optic cables are typically used for high-speed, long-distance connections.
Coaxial and serial cables are not standard for modern LANs.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What is the difference between Cat5e and Cat6 cables in terms of performance?
Question:
What is a star topology in networking?
Answer Options:
A network where devices are connected to a central hub or switch.
A network where devices are connected in a closed loop.
A network where devices are directly connected to one another.
A network where devices are connected in multiple paths for redundancy.
Correct Answer + Explanation:
A network where devices are connected to a central hub or switch.
In a star topology, each device connects individually to a central point, making it easy to manage and troubleshoot.
Practical Use:
A small office network uses a star topology with a central switch to connect workstations and printers.
Why Others Are Incorrect:
A closed loop is a ring topology.
Direct connections describe a mesh topology.
Multiple paths also describe a mesh topology.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What are the advantages of a star topology compared to a bus topology?
Question:
What is the purpose of using a crossover Ethernet cable?
Answer Options:
To connect devices with different speeds.
To connect two devices directly without a switch or hub.
To encrypt Ethernet traffic for secure transmission.
To assign IP addresses to connected devices.
Correct Answer + Explanation:
To connect two devices directly without a switch or hub.
Crossover cables allow direct communication between devices like PCs or routers by reversing the transmit and receive pins.
Practical Use:
Two laptops are connected directly using a crossover cable for file transfer without requiring a switch.
Why Others Are Incorrect:
Device speeds are managed by autonegotiation, not the cable type.
Encryption and IP assignment are unrelated to crossover cables.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
Why are crossover cables less commonly used in modern networks?
Question:
Which routing protocol is best suited for routing between autonomous systems on the internet?
Answer Options:
OSPF
RIP
BGP
EIGRP
Correct Answer + Explanation:
BGP
Border Gateway Protocol (BGP) is the standard routing protocol used to exchange routing information between autonomous systems on the internet.
Practical Use:
ISPs use BGP to share routing information and ensure data travels efficiently across multiple networks.
Why Others Are Incorrect:
OSPF: Designed for internal routing within an autonomous system.
RIP: Lacks scalability for large networks.
EIGRP: Proprietary to Cisco and primarily used in enterprise networks.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What factors influence the path selection process in BGP?
Question:
What is the primary advantage of using 802.1Q VLAN tagging?
Answer Options:
Encrypting data between VLANs.
Increasing available IP addresses.
Allowing multiple VLANs on a single trunk link.
Providing automatic failover for redundant links.
Correct Answer + Explanation:
Allowing multiple VLANs on a single trunk link.
802.1Q tagging inserts a VLAN ID into Ethernet frames, enabling multiple VLANs to share a single trunk connection.
Practical Use:
A trunk link between switches can carry traffic for VLANs such as accounting, HR, and IT.
Why Others Are Incorrect:
802.1Q does not provide encryption.
IP addressing is unrelated to VLAN tagging.
Failover is managed by protocols like STP, not 802.1Q.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
How does the Native VLAN work in 802.1Q tagging, and what are its security implications?
Question:
Which wireless frequency band provides greater range but lower data rates?
Answer Options:
2.4 GHz
5 GHz
6 GHz
900 MHz
Correct Answer + Explanation:
2.4 GHz
The 2.4 GHz band penetrates obstacles better and has a longer range but supports lower data rates compared to higher frequency bands.
Practical Use:
Deploying 2.4 GHz is ideal for covering large areas like warehouses or outdoor environments.
Why Others Are Incorrect:
5 GHz: Higher data rates but shorter range.
6 GHz: Higher capacity but limited range and penetration.
900 MHz: Rarely used in modern Wi-Fi networks.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What are the trade-offs between 2.4 GHz and 5 GHz for indoor Wi-Fi deployments?
Question:
What is the function of First Hop Redundancy Protocol (FHRP) in a network?
Answer Options:
Resolving IP addresses to MAC addresses.
Providing a backup gateway in case of a primary gateway failure.
Encrypting communication between devices.
Managing multicast group memberships.
Correct Answer + Explanation:
Providing a backup gateway in case of a primary gateway failure.
FHRP ensures high availability by providing redundancy for default gateways using protocols like HSRP or VRRP.
Practical Use:
If the primary gateway in a network fails, FHRP enables a secondary gateway to take over seamlessly.
Why Others Are Incorrect:
Address resolution is performed by ARP.
Encryption is unrelated to FHRP.
Multicast management is handled by IGMP.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
What are the differences between HSRP and VRRP in FHRP configurations?
Question:
What is a key benefit of implementing SD-WAN in an enterprise network?
Answer Options:
Simplified cable management.
Centralized management of WAN connections.
Increased availability of IPv4 addresses.
Automatic VLAN assignment.
Correct Answer + Explanation:
Centralized management of WAN connections.
SD-WAN (Software-Defined WAN) allows centralized control over WAN links, optimizing performance and reducing costs.
Practical Use:
A retail chain can use SD-WAN to manage connectivity across multiple store locations from a single interface.
Why Others Are Incorrect:
Cable management is unrelated to SD-WAN.
IPv4 availability is managed through subnetting or NAT.
VLAN assignment is a Layer 2 function, not SD-WAN’s role.
Exam Objective Reference:
N10-009 Domain 2.0: Network Implementation
Follow-Up:
How does SD-WAN improve performance and reliability compared to traditional WAN setups?