My /etc/ttys file. Is this suppose to be normal, if I've never edited it? Macbook Air, Mid-2013, Came with Mavericks, has Latest OS

ttys

#
#       @(#)ttys        5.2 (Berkeley) 6/10/93
#
# name  getty                           type    status          comments
#
#console        "/usr/libexec/getty std.57600"  vt100   on secure
console "/System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow" vt100 on secure onoption="/usr/libexec/getty std.9600"
#tahoe's only
#remote "/usr/libexec/getty std.1200"   pt      on              # diagnostics

# The tty.serial entry initializes the serial port (if any) for use as a 
# terminal (enabling logons over serial). If marked secure, the serial
# port will allow root logons. 
# To make the serial port available for outbound 
# communications, the tty.serial entry should be turned off
# (set the 4th field to off).
tty.serial      "/usr/libexec/getty serial.57600"        vt100   off secure

# Fax reception is off by default, use the 
# System Preferences panel to enable it.
fax     "/usr/bin/fax answer"   unknown off

# Hardwired lines are marked off, by default, so getty(8)
# is quiet when they don't exist.
tty[00-07]      "/usr/libexec/getty std.9600"   unknown off secure

# pseudo-ttys
ttyp[0x0-0xf]   none                    network slot=36
ttyq[0x0-0xf]   none                    network
ttyr[0x0-0xf]   none                    network
ttys[0x0-0xf]   none                    network
ttyt[0x0-0xf]   none                    network
ttyu[0x0-0xf]   none                    network
ttyv[0x0-0xf]   none                    network
ttyw[0x0-0xf]   none                    network

# cloning ptys
ttys[000-999]   none                    network