--- a/dns.rst	Sat Oct 31 16:27:37 2020 +0200
+++ b/dns.rst	Tue Nov 03 19:09:20 2020 +0200
@@ -6,15 +6,15 @@
 .. contents::
    :local:
 
-About DNS resolving protocol.
-=============================
+About DNS resolving protocol
+============================
 
 Default port for name resolving is ``53``::
 
   $ nslookup -port=53 microsoft.com
 
-Debugging name resolution.
-==========================
+Debugging name resolution
+=========================
 ::
 
   $ nslookup -debug microsoft.com
@@ -34,8 +34,8 @@
 
   $ dig +trace +additional google.com
 
-IP from host name.
-==================
+IP from host name
+=================
 
 This request is for the ``A`` record and default for ``nslookup`` command::
 
@@ -60,22 +60,22 @@
   $ host 8.8.4.4
   4.4.8.8.in-addr.arpa domain name pointer google-public-dns-b.google.com.
 
-List authoritative NS for domain.
-=================================
+List authoritative NS for domain
+================================
 ::
 
   $ dig ns defun.work
   $ nslookup -type=ns defun.work
 
-List MX records for domain.
-===========================
+List MX records for domain
+==========================
 ::
 
   $ dig mx mail.google.com
   $ nslookup -type=mx mail.google.com
 
-Query for TXT records.
-======================
+Query for TXT records
+=====================
 ::
 
   $ dig -t TXT google.com
@@ -84,8 +84,8 @@
   $ nslookup -q=txt google.com
   $ host -t txt google.com
 
-List SOA records for domain.
-============================
+List SOA records for domain
+===========================
 
 SOA ("Start Of Authority") Record for a domain provides technical information
 about the domain::
@@ -107,8 +107,8 @@
 Email adress for domain administrator is ``admin@mindsandmachines.com`` for
 above output.
 
-List domain names.
-==================
+List domain names
+=================
 ::
 
   $ dig ns dp.gov.ua
@@ -123,8 +123,8 @@
   dp.gov.ua.              3600    IN      A       195.64.190.1
   adm.dp.gov.ua.          3600    IN      A       195.64.190.1
 
-Get info about NS.
-==================
+Get info about NS
+=================
 
 Version of running NS::