vlan without assigning ip address

I have  a 6248 Dell switch with following vlan's created

interface vlan 2
name "ISCSI1"
exit
interface vlan 3
name "ISCSI2"
exit

interface vlan 4
name "CSV"
exit
interface vlan 5
name "LiveMigration"
exit

And have interfaces assigned to the vlan's.

interface ethernet 1/g2
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 2
exit

!
interface ethernet 1/g3
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 2
exit
!
interface ethernet 1/g4
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 2
exit
!
interface ethernet 1/g5
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 2
exit

!
interface ethernet 1/g6
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 2
exit
!
interface ethernet 1/g7
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 2
exit
!
interface ethernet 1/g8
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 3
exit

!
interface ethernet 1/g9
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 3
exit
!
interface ethernet 1/g10
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 3
exit
!
interface ethernet 1/g11
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 3
exit

!
interface ethernet 1/g12
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 3
exit
!
interface ethernet 1/g13
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 3
exit
!
interface ethernet 1/g14
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 4
exit

!
interface ethernet 1/g15
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 4
exit
!
interface ethernet 1/g16
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 4
exit
!
interface ethernet 1/g17
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 5
exit

!
interface ethernet 1/g18
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 5
exit
!
interface ethernet 1/g19
spanning-tree disable
spanning-tree portfast
mtu 9216
switchport access vlan 5

However there is not ip address assigned to vlan, No network is assigned to any vlan.

My question is are these vlan active and then how are they communicating with each other?