diff --git a/src/ALZ/Private/Tools/Checks/Test-NetworkConnectivity.ps1 b/src/ALZ/Private/Tools/Checks/Test-NetworkConnectivity.ps1
new file mode 100644
index 00000000..a12e8667
--- /dev/null
+++ b/src/ALZ/Private/Tools/Checks/Test-NetworkConnectivity.ps1
@@ -0,0 +1,38 @@
+function Test-NetworkConnectivity {
+    [CmdletBinding()]
+    param()
+
+    $results = @()
+    $hasFailure = $false
+
+    $endpoints = @(
+        @{ Uri = "https://api.github.com";             Description = "GitHub API (release lookups)" },
+        @{ Uri = "https://github.com";                 Description = "GitHub (module downloads)" },
+        @{ Uri = "https://api.releases.hashicorp.com"; Description = "HashiCorp Releases API (Terraform version)" },
+        @{ Uri = "https://releases.hashicorp.com";     Description = "HashiCorp Releases (Terraform binary download)" },
+        @{ Uri = "https://management.azure.com";       Description = "Azure Management API" },
+        @{ Uri = "https://www.powershellgallery.com";  Description = "PowerShell Gallery (module installs/updates)" }
+    )
+
+    foreach ($endpoint in $endpoints) {
+        Write-Verbose "Testing network connectivity to $($endpoint.Uri)"
+        try {
+            Invoke-WebRequest -Uri $endpoint.Uri -Method Head -TimeoutSec 10 -SkipHttpErrorCheck -ErrorAction Stop -UseBasicParsing | Out-Null
+            $results += @{
+                message = "Network connectivity to $($endpoint.Description) ($($endpoint.Uri)) is available."
+                result  = "Success"
+            }
+        } catch {
+            $results += @{
+                message = "Cannot reach $($endpoint.Description) ($($endpoint.Uri)). Check network/firewall settings. Error: $($_.Exception.Message)"
+                result  = "Failure"
+            }
+            $hasFailure = $true
+        }
+    }
+
+    return @{
+        Results    = $results
+        HasFailure = $hasFailure
+    }
+}
diff --git a/src/ALZ/Private/Tools/Test-Tooling.ps1 b/src/ALZ/Private/Tools/Test-Tooling.ps1
index 1fda2742..49a65fc7 100644
--- a/src/ALZ/Private/Tools/Test-Tooling.ps1
+++ b/src/ALZ/Private/Tools/Test-Tooling.ps1
@@ -2,7 +2,7 @@ function Test-Tooling {
     [CmdletBinding(SupportsShouldProcess = $true)]
     param(
         [Parameter(Mandatory = $false)]
-        [ValidateSet("PowerShell", "Git", "AzureCli", "AzureEnvVars", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion", "YamlModule", "YamlModuleAutoInstall", "GitHubCli", "AzureDevOpsCli")]
+        [ValidateSet("PowerShell", "Git", "AzureCli", "AzureEnvVars", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion", "YamlModule", "YamlModuleAutoInstall", "GitHubCli", "AzureDevOpsCli", "NetworkConnectivity")]
         [string[]]$Checks = @("PowerShell", "Git", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion"),
         [Parameter(Mandatory = $false)]
         [switch]$destroy
@@ -91,6 +91,13 @@ function Test-Tooling {
         if ($result.HasFailure) { $hasFailure = $true }
     }
 
+    # Check Network Connectivity
+    if ($Checks -contains "NetworkConnectivity") {
+        $result = Test-NetworkConnectivity
+        $checkResults += $result.Results
+        if ($result.HasFailure) { $hasFailure = $true }
+    }
+
     # Display results
     Write-Verbose "Showing check results"
     Write-Verbose $(ConvertTo-Json $checkResults -Depth 100)
diff --git a/src/ALZ/Public/Deploy-Accelerator.ps1 b/src/ALZ/Public/Deploy-Accelerator.ps1
index 776c91bd..45a9ee02 100644
--- a/src/ALZ/Public/Deploy-Accelerator.ps1
+++ b/src/ALZ/Public/Deploy-Accelerator.ps1
@@ -250,6 +250,9 @@ function Deploy-Accelerator {
                 $checks += "YamlModuleAutoInstall"
             }
         }
+        if (-not $skip_internet_checks.IsPresent) {
+            $checks += "NetworkConnectivity"
+        }
         $toolingResult = Test-Tooling -Checks $checks -destroy:$destroy.IsPresent
     }
 
diff --git a/src/ALZ/Public/Test-AcceleratorRequirement.ps1 b/src/ALZ/Public/Test-AcceleratorRequirement.ps1
index b520782b..0e0698aa 100644
--- a/src/ALZ/Public/Test-AcceleratorRequirement.ps1
+++ b/src/ALZ/Public/Test-AcceleratorRequirement.ps1
@@ -3,7 +3,7 @@ function Test-AcceleratorRequirement {
     .SYNOPSIS
         Test that the Accelerator software requirements are met
     .DESCRIPTION
-        This will check for the pre-requisite software
+        This will check for the pre-requisite software and network connectivity to the external endpoints required by the Accelerator.
     .EXAMPLE
         C:\PS> Test-AcceleratorRequirement
     .EXAMPLE
@@ -20,10 +20,10 @@ function Test-AcceleratorRequirement {
     param (
         [Parameter(
             Mandatory = $false,
-            HelpMessage = "[OPTIONAL] Specifies which checks to run. Valid values: PowerShell, Git, AzureCli, AzureEnvVars, AzureCliOrEnvVars, AzureLogin, AlzModule, AlzModuleVersion, YamlModule, YamlModuleAutoInstall, GitHubCli, AzureDevOpsCli"
+            HelpMessage = "[OPTIONAL] Specifies which checks to run. Valid values: PowerShell, Git, AzureCli, AzureEnvVars, AzureCliOrEnvVars, AzureLogin, AlzModule, AlzModuleVersion, YamlModule, YamlModuleAutoInstall, GitHubCli, AzureDevOpsCli, NetworkConnectivity"
         )]
-        [ValidateSet("PowerShell", "Git", "AzureCli", "AzureEnvVars", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion", "YamlModule", "YamlModuleAutoInstall", "GitHubCli", "AzureDevOpsCli")]
-        [string[]]$Checks = @("PowerShell", "Git", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion")
+        [ValidateSet("PowerShell", "Git", "AzureCli", "AzureEnvVars", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion", "YamlModule", "YamlModuleAutoInstall", "GitHubCli", "AzureDevOpsCli", "NetworkConnectivity")]
+        [string[]]$Checks = @("PowerShell", "Git", "AzureCliOrEnvVars", "AzureLogin", "AlzModule", "AlzModuleVersion", "NetworkConnectivity")
     )
     Test-Tooling -Checks $Checks
 }
diff --git a/src/Tests/Unit/Private/Test-NetworkConnectivity.Tests.ps1 b/src/Tests/Unit/Private/Test-NetworkConnectivity.Tests.ps1
new file mode 100644
index 00000000..bb3a65d3
--- /dev/null
+++ b/src/Tests/Unit/Private/Test-NetworkConnectivity.Tests.ps1
@@ -0,0 +1,111 @@
+#-------------------------------------------------------------------------
+Set-Location -Path $PSScriptRoot
+#-------------------------------------------------------------------------
+$ModuleName = 'ALZ'
+$PathToManifest = [System.IO.Path]::Combine('..', '..', '..', $ModuleName, "$ModuleName.psd1")
+#-------------------------------------------------------------------------
+if (Get-Module -Name $ModuleName -ErrorAction 'SilentlyContinue') {
+    #if the module is already in memory, remove it
+    Remove-Module -Name $ModuleName -Force
+}
+Import-Module $PathToManifest -Force
+#-------------------------------------------------------------------------
+
+InModuleScope 'ALZ' {
+    Describe 'Test-NetworkConnectivity Private Function Tests' -Tag Unit {
+        BeforeAll {
+            $WarningPreference = 'SilentlyContinue'
+            $ErrorActionPreference = 'SilentlyContinue'
+        }
+
+        Context 'All endpoints are reachable' {
+            BeforeAll {
+                Mock -CommandName Invoke-WebRequest -MockWith {
+                    [PSCustomObject]@{ StatusCode = 200 }
+                }
+            }
+
+            It 'returns HasFailure = $false when all endpoints succeed' {
+                $result = Test-NetworkConnectivity
+                $result.HasFailure | Should -BeFalse
+            }
+
+            It 'returns a Success result for every endpoint' {
+                $result = Test-NetworkConnectivity
+                $result.Results | ForEach-Object {
+                    $_.result | Should -Be "Success"
+                }
+            }
+
+            It 'returns one result per endpoint (6 total)' {
+                $result = Test-NetworkConnectivity
+                $result.Results.Count | Should -Be 6
+            }
+        }
+
+        Context 'One endpoint is unreachable' {
+            BeforeAll {
+                Mock -CommandName Invoke-WebRequest -ParameterFilter { $Uri -eq "https://api.github.com" } -MockWith {
+                    throw "Unable to connect to the remote server"
+                }
+                Mock -CommandName Invoke-WebRequest -MockWith {
+                    [PSCustomObject]@{ StatusCode = 200 }
+                }
+            }
+
+            It 'returns HasFailure = $true' {
+                $result = Test-NetworkConnectivity
+                $result.HasFailure | Should -BeTrue
+            }
+
+            It 'returns a Failure result for the unreachable endpoint' {
+                $result = Test-NetworkConnectivity
+                $failureResults = @($result.Results | Where-Object { $_.result -eq "Failure" })
+                $failureResults.Count | Should -Be 1
+            }
+
+            It 'includes the error message in the Failure result' {
+                $result = Test-NetworkConnectivity
+                $failureResult = @($result.Results | Where-Object { $_.result -eq "Failure" })[0]
+                $failureResult.message | Should -Match "Cannot reach"
+                $failureResult.message | Should -Match "api.github.com"
+            }
+
+            It 'still returns Success results for the reachable endpoints' {
+                $result = Test-NetworkConnectivity
+                $successResults = @($result.Results | Where-Object { $_.result -eq "Success" })
+                $successResults.Count | Should -Be 5
+            }
+        }
+
+        Context 'All endpoints are unreachable' {
+            BeforeAll {
+                Mock -CommandName Invoke-WebRequest -MockWith {
+                    throw "Network unreachable"
+                }
+            }
+
+            It 'returns HasFailure = $true' {
+                $result = Test-NetworkConnectivity
+                $result.HasFailure | Should -BeTrue
+            }
+
+            It 'returns a Failure result for every endpoint' {
+                $result = Test-NetworkConnectivity
+                $result.Results | ForEach-Object {
+                    $_.result | Should -Be "Failure"
+                }
+            }
+
+            It 'returns one result per endpoint (6 total)' {
+                $result = Test-NetworkConnectivity
+                $result.Results.Count | Should -Be 6
+            }
+
+            It 'checks all endpoints and does not stop at the first failure' {
+                $result = Test-NetworkConnectivity
+                Should -Invoke -CommandName Invoke-WebRequest -Times 6 -Scope It
+            }
+        }
+    }
+}