Which of the following cable types is associated with an Ethernet with a RJ45 connector？（）

单项选择题Whichofthefollowingcabletypescancauseinterferenceonthenetworkwhendisconnectinganyonemachine？（）

A.Coaxial
B.Cat 1 UTP
C.Cat 3 UTP
D.Cat 5 UTP

单项选择题Whichofthefollowingfilescontainsthesettingsforthesystem’sDNSdomainnameandDNSservers？（）

A./etc/hosts
B./etc/resolv.conf
C./etc/netsvc.conf
D./etc/named.boot

单项选择题WhichofthefollowingoptionsbestjustifieswhyaDNSservershouldberuninalargenetworksystem？（）

A.To use ftp and telnet
B.To perform NFS mounts
C.To make /etc/hosts files unnecessary
D.To reduce network traffic and save bandwidth

单项选择题WhendividinganexistingClassBnetworkinto2subnetsof32，766hostseach，whichofthefollowingsubnetmasksshouldbeused？（）

A.128.0.0.0
B.255.128.0.0
C.255.254.0.0
D.255.255.128.0

单项选择题Ahostistobecomepartofahierarchicalnamingtopology.Whichofthefollowingservicesarerequired？（）

A.DHCP
B.Domain Name Service
C.Network Information Service
D.A hosts file