chore: Update section titles for enhanced sign-in security, personal data encryption, assigned access, configuration lock, and DNS security

windows/security/book/operating-system-security-network-security.md

@@ -21,7 +21,7 @@ In enterprise environments, network protection works best with Microsoft Defende
 
 - [How to protect your network](/defender-endpoint/network-protection)
 
-## Transport layer security (TLS)
+## Transport Layer Security (TLS)
 
 Transport Layer Security (TLS) is the internet's most deployed security protocol, encrypting data in transit to provide a secure communication channel between two endpoints. Windows defaults to the latest protocol versions and strong cipher suites unless policies are in effect to limit them. There are many extensions available, such as client authentication for enhanced server security and session resumption for improved application performance.
 
@@ -36,7 +36,7 @@ Legacy protocol versions TLS 1.0 and 1.1 are officially deprecated and will be d
 - [TLS/SSL overview (Schannel SSP)](/windows-server/security/tls/tls-ssl-schannel-ssp-overview)
 - [TLS 1.0 and TLS 1.1 soon to be disabled in Windows](https://techcommunity.microsoft.com/t5/windows-it-pro-blog/tls-1-0-and-tls-1-1-soon-to-be-disabled-in-windows/bc-p/3894928/emcs_t/S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufExMM0hCN0VURDk3OU9OfDM4OTQ5Mjh8U1VCU0NSSVBUSU9OU3xoSw#M6180)
 
-## DNS security
+## Domain Name System (DNS) security
 
 In Windows 11, the Windows DNS client supports DNS over HTTPS and DNS over TLS, two encrypted DNS protocols. These allow administrators to ensure their devices protect their
 name queries from on-path attackers, whether they are passive observers logging browsing behavior or active attackers trying to redirect clients to malicious sites. In a Zero Trust