| Subject | English | Arabic |
| comp., MS | backup designated router | موجة النسخ الاحتياطية المعينة (An OSPF router that forms adjacencies with all other routers on a multiple access network and becomes the designated router when the designated router becomes unavailable) |
| comp., MS | designated router | موجه مخصص (An OSPF router that forms adjacencies with all other routers on a multiple access network) |