A.SGSN
B.GGSN
C.DNS
D.HLR

A.Cell未覆盖
B.没有数据流
C.核心网设备故障
D.手机故障

A.SGSN
B.HLR
C.GGSN
D.DNS

A.SGSN
B.HLR
C.CG
D.DNS

A.SGSN
B.GGSN
C.DNS
D.Firewall

A.APN到GGSN地址翻译
B.网元domain名到ip地址翻译
C.网元ip地址到domain名翻译
D.RA到SGSN的翻译

A.next
B.forwarders
C.root
D.senior

A./etc/log/
B./var/log/
C./var/adm/syslog/
D./etc/adm/log/

A.GGSN Router
B.SGSN Router
C.CG Router
D.OMCG Router

A.Firmware
B.Dunix
C.Nectar
D.openview

A.best-effort
B.normal
C.premium
D.better-effort