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CompTIA Network+ 5.3 CompTIA Network+ 5.5 Cisco CCST Networking 5.3
TechKnowSurge Catalog Interactives Where Does the Ping Test Point?
InteractiveNetworkFree

Where Does the Ping Test Point?

Some pings answer and one fails. Sort each result by where the fault is.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

The lesson's ping ladder, one rung at a time: 1. **Loopback** (127.0.0.1, or ::1 in IPv6). A reply means the PC's own TCP/IP software works. The packet never leaves the PC, so it tests neither the network card nor the cable: the video says it shows the interface is up and connected, which it does not. 2. **The default gateway.** A reply means the PC has a working address and mask and can reach its local network, and that the gateway is up. 3. **An outside address**, such as 8.8.8.8. A reply means traffic gets past the gateway and the provider. Pinging an address uses no DNS at all: the video says pinging 8.8.8.8 proves name resolution, which it does not. 4. **A name**, such as www.example.com. Only this rung tests DNS: if addresses answer and a name does not, name resolution is the fault. The first rung that fails points at the fault: everything before it worked. A device that blocks ping can also look like a failure, which the lesson leaves aside. Typing ping and reading its output waits for the terminal activity type.

What you'll learn

Aligned to

CompTIA Network+
5.3 Given a scenario, troubleshoot common issues with network services.
5.5 Given a scenario, use the appropriate tool or protocol to solve networking issues.
Cisco CCST Networking
5.3 Run basic diagnostic commands and interpret the results

Key terms

Ping
A command-line diagnostic utility that uses ICMP echo request and echo reply messages to test whether a remote host is reachable on a network and to measure the round-trip time for packets. It is one of the first tools used when troubleshooting network connectivity issues.
Loopback Address
The reserved IPv4 address 127.0.0.1 (within the 127.0.0.0/8 range) that a device uses to send traffic to itself, allowing the local network stack to be tested without sending packets onto a physical network. Pinging 127.0.0.1 is a quick way to verify that a device's TCP/IP stack is functioning.
Default Gateway
The router that a device uses to send traffic to destinations outside its local network.
Domain Name System
DNS
A hierarchical naming system that translates human-readable domain names into IP addresses.
Internet Control Message Protocol
ICMP
A network layer protocol used to send error messages and operational information about network conditions.

Topics

Troubleshooting Ping Loopback Default Gateway Dns Interactive Categorize

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