Cisco CCST-Networking Practice Test - Questions Answers, Page 3

Wireshark Filters: Wireshark Display Filters

When devices within a VLAN are unable to reach addresses outside their VLAN, it typically indicates that they do not have a configured path to external networks. The engineer should configure a default gateway for VLAN2. The default gateway is the IP address of the router's interface that is connected to the VLAN, which will route traffic from the VLAN to other networks12.

* Understanding and Configuring VLAN Routing and Bridging on a Router Using the IRB Feature

* VLAN 2 not able to ping gateway - Cisco Community

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* VLANs: Virtual Local Area Networks (VLANs) logically segment network traffic to improve security and performance. Devices within the same VLAN can communicate directly.

* Default Gateway: For devices in VLAN2 to communicate with devices outside their VLAN, they need a default gateway configured. The default gateway is typically a router or Layer 3 switch that routes traffic between different VLANs and subnets.

* Additional VLAN: Not needed in this scenario as the issue is related to routing traffic outside VLAN2, not creating another VLAN.

* Default Route: While a default route on the router may be necessary, the primary issue for devices within VLAN2 is to have a configured default gateway.

* Static Route: This is used on routers to manually specify routes to specific networks but does not address the need for a default gateway on the client devices.

* Cisco VLAN Configuration Guide: Cisco VLAN Configuration

* Understanding and Configuring VLANs: VLANs Guide

The CIDR (Classless Inter-Domain Routing) notation for the subnet mask 255.255.252.0 is /22. This notation indicates that the first 22 bits of the IP address are used for network identification, and the remaining bits are used for host addresses within the network1.

* Subnet Cheat Sheet -- 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network Reference

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* Subnet Mask to CIDR Notation: The given subnet mask is 255.255.252.0. To convert this to CIDR notation:

* Convert the subnet mask to binary: 11111111.11111111.11111100.00000000

* Count the number of consecutive 1s in the binary form: There are 22 ones.

* Therefore, the CIDR notation is /22.

* Understanding Subnetting and CIDR: Cisco CIDR Guide

* 1000BASE-T Cable: This refers to Gigabit Ethernet over twisted-pair cables (Cat 5e or higher).

* Connector: RJ-45 connectors are used for Ethernet cables, including those used for 1000BASE-T.

* Coax: Used for cable TV and older Ethernet standards like 10BASE2.

* RJ-11: Used for telephone connections.

* OS2 LC: Used for fiber optic connections.

* Ethernet Standards and Cables: Ethernet Cable Guide

The tracert command is used to determine the route taken by packets across an IP network. When a user reports that an external web page is not loading, while other resources are accessible, it suggests there might be an issue at a certain point in the network path to the specific web page. The tracert command helps to diagnose where the breakdown occurs by displaying a list of routers that the packets pass through on their way to the destination. It can identify the network segment where the packets stop progressing, which is valuable for pinpointing where the connectivity issue lies. Reference := Cisco CCST Networking Certification FAQs -- CISCONET Training Solutions, Command Prompt (CMD): 10 network-related commands you should know, Network Troubleshooting Commands Guide: Windows, Mac & Linux - Comparitech, How to Use the Traceroute and Ping Commands to Troubleshoot Network, Network Troubleshooting Techniques: Ping, Traceroute, PathPing.

* tracert Command: This command is used to determine the path packets take to reach a destination. It lists all the hops (routers) along the way and can help identify where the delay or failure occurs.

* ping -t: This command sends continuous ping requests and is useful for determining if a host is reachable but does not provide path information.

* ipconfig /all: This command displays all current TCP/IP network configuration values and can be used to verify network settings but not to trace a network path.

* nslookup: This command queries the DNS to obtain domain name or IP address mapping, useful for DNS issues but not for tracing network paths.

* Microsoft tracert Command: tracert Command Guide

* Troubleshooting Network Issues with tracert: Network Troubleshooting Guide

* Statement B: 'The same default gateway IPv4 address is configured on each host on the local network.' This is true because all hosts on the same local network (subnet) use the same default gateway IP address to send packets destined for other networks.

* Statement D: 'The default gateway is the IPv4 address of the router interface connected to the same local network as the host.' This is true because the default gateway is the IP address of the router's interface that is directly connected to the local network.

* Statement A: 'The IPv4 address of the default gateway must be the first host address in the subnet.' This is not necessarily true. The default gateway can be any address within the subnet range.

* Statement C: 'The default gateway is the Loopback0 interface IPv4 address of the router connected to the same local network as the host.' This is not true; the default gateway is the IP address of the router's physical or logical interface connected to the local network.

* Statement E: 'Hosts learn the default gateway IPv4 address through router advertisement messages.' This is generally true for IPv6 with Router Advertisement (RA) messages, but not typically how IPv4 hosts learn the default gateway address.

* Cisco Default Gateway Configuration: Cisco Default Gateway

Statement A: 'A detailed description of the fault.' This is essential for support staff to understand the nature of the problem and begin troubleshooting effectively.

Statement C: 'A description of the conditions when the fault occurs.' This helps in reproducing the issue and identifying patterns that might indicate the cause of the fault.

Statement B: 'Details about the computers connected to the network.' While useful, this is not as immediately critical as understanding the fault itself and the conditions under which it occurs.

Statement D: 'The actions taken to resolve the fault.' This is important but typically follows the initial report.

Statement E: 'The description of the top-down fault-finding procedure.' This is more of a troubleshooting methodology than information typically included in an initial support ticket.

Best Practices for Submitting Support Tickets: Support Ticket Guidelines

Network Types Overview: Cisco Networking Basics

Understanding Different Network Types: Network Types Guide

Understanding Firewalls: Firewall Capabilities

Network Security Best Practices: Network Security Guide