Apache가 포트 80 대신 포트 8080에서 실행되는 이유는 무엇입니까?

Apache가 포트 80에서 응답하지 않는 이유가 무엇인지 궁금합니다.

$ wget http://localhost:80  
--2014-05-06 15:32:44--  http://localhost/
Resolving localhost (localhost)... 127.0.0.1
Connecting to localhost (localhost)|127.0.0.1|:80... failed: Connection refused.

...하지만 8080 이후에는...

$ wget http://localhost:8080
--2014-05-06 15:32:38--  http://localhost:8080/
Resolving localhost (localhost)... 127.0.0.1
Connecting to localhost (localhost)|127.0.0.1|:8080... connected.
HTTP request sent, awaiting response... 200 OK
Length: 177 [text/html]
Saving to: ‘index.html’

100%[=================================================>] 177 --.-K/s   in 0s

2014-05-06 15:32:38 (16,4 MB/s) - ‘index.html’ saved [177/177]

출력물에 많이 표시되지 않음아파치2ctl:

$ apache2ctl -t -D DUMP_VHOSTS
VirtualHost configuration:
*:80 is a NameVirtualHost
   default server localhost (/etc/apache2/sites-enabled/000-default.conf:1)
   port 80 namevhost localhost (/etc/apache2/sites-enabled/000-default.conf:1)
   port 80 namevhost localhost (/etc/apache2/sites-enabled/000-default.conf:1)

하지만,네트워크 통계포트 확인:

$ sudo netstat -anp | grep :8080
tcp6       0      0 :::8080        :::*       LISTEN      5353/apache2

---

~처럼조엘이 물었다여기있어 ports.conf:

$ sudo cat /etc/apache2/ports.conf
# If you just change the port or add more ports here, you will likely also
# have to change the VirtualHost statement in
# /etc/apache2/sites-enabled/000-default

Listen 8080

<IfModule ssl_module>
    Listen 443
</IfModule>

<IfModule mod_gnutls.c>
    Listen 443
</IfModule>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
# NameVirtualHost *:8800
Listen 8800