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| Section | Weight | Objectives |
|---|---|---|
| Standards and Concepts | 20% | - OSI and TCP/IP models - Network topologies and types - Common network protocols - Bandwidth, throughput, and latency |
| Diagnosing Problems | 15% | - Command-line utilities (ping, traceroute, nslookup) - Packet capture and analysis basics - Remote access methods (SSH, RDP, console) - Troubleshooting methodology |
| Endpoints and Media Types | 15% | - Wired, wireless, and cellular technologies - Network cables and connectors - Connectivity verification tools - Endpoint devices and operating systems |
| Infrastructure | 20% | - Wireless access points and SSIDs - Routing concepts and default gateway - Switching concepts and VLANs - Network device ports and status indicators |
| Addressing and Subnet Formats | 20% | - IPv6 addressing and prefixes - Public vs private IP and NAT - Subnet mask and CIDR notation - IPv4 addressing and subnetting |
| Security | 10% | - Firewall and access control principles - CIA triad and AAA model - Wireless security standards (WPA2/WPA3) - Common threats and vulnerabilities |
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NEW QUESTION # 26
Move each cloud service model on the left to its correct description on the right.
Answer:
Explanation:
Explanation:
* PaaS - Platform as a Service
* IaaS - Infrastructure as a Service
* SaaS - Software as a Service
The three primary cloud computing service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Each provides a different level of abstraction and customer responsibility.
1. PaaS - Platform as a Service
PaaS supplies a managed environment for developing, testing, deploying, running, and managing applications. The cloud provider maintains the underlying infrastructure, operating systems, and middleware, while customers focus primarily on application code and data. Examples include Azure App Service and Google App Engine.
2. IaaS - Infrastructure as a Service
IaaS provides on-demand access to computing infrastructure, including virtual machines, virtual storage, and networking resources. Customers provision these resources as needed and typically pay according to consumption. The provider manages physical infrastructure and virtualization, while customers manage guest operating systems, applications, and associated configurations. Examples include Amazon EC2 and Azure Virtual Machines.
3. SaaS - Software as a Service
SaaS delivers fully managed software applications over the internet. Users access these applications through web browsers or supported clients without maintaining the underlying servers or application infrastructure.
Examples include Microsoft 365 and Cisco Webex.
The essential distinction is the level of management responsibility: IaaS provides infrastructure, PaaS provides an application platform, and SaaS provides complete applications. Cisco ' s cloud computing documentation confirms these service model definitions.
References:
Cisco Certified Support Technician Networking (100-150) - Standards and Concepts, Cloud Computing and Cloud Service Models.
Cisco - What Is Cloud Computing?, Types of Cloud Computing Services.
Cisco - SAFE Secure Cloud Architecture Guide, Cloud Service Types and Shared Responsibility Model.
Cisco - Virtualized Multi-Tenant Data Center Cloud Consumer Models.
NEW QUESTION # 27
Which protocol does an IPv6 host use to resolve the MAC address associated with a destination IPv6 address?
Answer: D
Explanation:
Neighbor Discovery Protocol (NDP) is an essential IPv6 protocol responsible for discovering neighboring devices, resolving IPv6 addresses to MAC addresses, identifying routers, and verifying network reachability.
NDP operates using Internet Control Message Protocol version 6 (ICMPv6) and replaces the address- resolution functionality performed by ARP in IPv4 networks.
The address-resolution process involves two primary ICMPv6 messages:
* Neighbor Solicitation (NS) - ICMPv6 Type 135: The source host sends a Neighbor Solicitation message to the destination ' s solicited-node multicast address to discover its corresponding MAC address.
* Neighbor Advertisement (NA) - ICMPv6 Type 136: The destination responds with a Neighbor Advertisement containing its link-layer address, enabling communication.
This resolution operates on the local link. When the destination IPv6 address belongs to a remote network, the host resolves the MAC address of its next-hop router instead.
Why the other options are incorrect:
B). CDP: Discovers directly connected Cisco devices and provides device information.
C). DHCP: Assigns network configuration parameters to clients; it does not perform IPv6-to-MAC address resolution.
D). ARP: Resolves IPv4 addresses to MAC addresses and is not used for IPv6 address resolution.
Cisco documentation confirms that IPv6 uses NDP and Neighbor Solicitation/Advertisement messages for link-layer address resolution.
References:
Cisco Certified Support Technician Networking (100-150) - Addressing and Subnet Formats, IPv6 Addressing.
Cisco IPv6 Addressing and Basic Connectivity Configuration Guide - IPv6 Neighbor Discovery.
Cisco Catalyst 9800 IPv6 Configuration Documentation - Neighbor Discovery Caching.
NEW QUESTION # 28
Drag and Drop Question
You need to configure wireless settings for a home router.
Move the actions from the list on the left to the correct scenarios on the right. You may use each action once, more than once, or not at all.
Note: You will receive partial credit for each correct answer.
Answer:
Explanation:
Explanation:
WPA2-PSK requires devices to use a pre-shared key when joining the wireless network.
Disabling SSID broadcasting helps prevent devices from seeing the wireless network name in normal discovery. Disabling WPS prevents users from connecting through the push-button setup method.
NEW QUESTION # 29
Which protocol is used by IPv6-enabled hosts to perform automatic stateless address configuration?
Answer: A
Explanation:
Internet Control Message Protocol version 6 (ICMPv6) provides the messaging functionality required for IPv6 Stateless Address Autoconfiguration (SLAAC). SLAAC allows IPv6-enabled hosts to automatically generate their own IPv6 addresses without requiring a DHCPv6 server to assign them.
SLAAC operates through the IPv6 Neighbor Discovery Protocol (NDP), which uses ICMPv6 messages.
The process involves the following operations:
* Router Solicitation (RS) - ICMPv6 Type 133: An IPv6 host can send an RS message to discover routers on the local network.
* Router Advertisement (RA) - ICMPv6 Type 134: The router advertises the network prefix, prefix lifetime, default-router information, and configuration flags.
* Address Generation: The host combines the advertised 64-bit network prefix with a 64-bit interface identifier to construct a 128-bit IPv6 address.
* Duplicate Address Detection (DAD): The host uses ICMPv6 Neighbor Solicitation messages to verify that its address is not already in use.
Why the other options are incorrect:
A). DHCPv6: Provides stateful address assignment or additional configuration parameters but is not required for SLAAC.
B). DNS: Resolves domain names to IP addresses.
D). TFTP: Transfers files using a lightweight file-transfer protocol.
Cisco confirms that SLAAC uses ICMPv6 Router Solicitation and Router Advertisement messages.
References:
Cisco Certified Support Technician Networking (100-150) - IPv6 Addressing and Automatic Address Configuration.
Cisco IPv6 Addressing and Basic Connectivity Configuration Guide - IPv6 Neighbor Discovery.
Cisco Troubleshoot IPv6 Dynamic Address Assignment - SLAAC, Router Solicitation, and Router Advertisement.
NEW QUESTION # 30
DRAG DROP
Examine the connections shown in the following image. Move the cable types on the right to the appropriate connection description on the left. You may use each cable type more than once or not at all.
Answer:
Explanation:
Explanation:
Based on the image description provided, here are the cable types matched with the appropriate connection descriptions:
Connects Switch S1 to Router R1 Gi0/0/1 interface Cable Type: = Straight-through UTP Cable
Connects Router R2 Gi0/0/0 to Router R3 Gi0/0/0 via underground conduit Cable Type: = Fiber Optic Cable
Connects Router R1 Gi0/0/0 to Router R2 Gi0/0/1 Cable Type: = Crossover UTP Cable
Connects Switch S3 to Server0 network interface card Cable Type: = Straight-through UTP Cable
The choices are based on standard networking practices where:
Straight-through UTP cables are typically used to connect a switch to a router or a network interface card.
Fiber optic cables are ideal for long-distance, high-speed data transmission, such as connections through an underground conduit.
Crossover UTP cables are used to connect similar devices, such as router-to-router connections.
These matches are consistent with the color-coded cables in the image: green for switch connections, yellow for router-to-router connections within the same rack, and blue for inter-rack connections. The use of these cables follows the Ethernet cabling standards.
Connects Switch S1 to Router R1 Gi0/0/1 interface:
Cable Type: Straight-through UTP Cable
A straight-through UTP cable is typically used to connect different types of devices, such as a switch to a router.
Connects Router R2 Gi0/0/0 to Router R3 Gi0/0/0 via underground conduit:
Cable Type: Fiber Optic Cable
Fiber optic cables are used for long-distance connections, such as those through an underground conduit between buildings.
Connects Router R1 Gi0/0/0 to Router R2 Gi0/0/1:
Cable Type: Crossover UTP Cable
A crossover UTP cable is typically used to connect similar devices directly, such as router to router connections.
Connects Switch S3 to Server0 network interface card:
Cable Type: Straight-through UTP Cable
A straight-through UTP cable is typically used to connect a switch to an end device, such as a server.
Straight-through UTP Cable: Used to connect different devices (e.g., switch to router, switch to server).
Crossover UTP Cable: Used to connect similar devices directly (e.g., router to router, switch to switch).
Fiber Optic Cable: Used for long-distance and high-speed connections, often between buildings or data centers.
Reference: Network Cable Types and Uses: Cisco Network Cables
Understanding Ethernet Cabling: Ethernet Cable Guide
NEW QUESTION # 31
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