$4\mathrm{.}3-4$a$.$ IPv$4/$IPv$6$ co$-$existence: tunneling $($a$).$ Consider the mixed IPv$4/$IPv$6$ network shown below, where an IPv$4$ tunnel exists between IPv$6$ routers B and E$.$ Suppose that IPv$6$ router A sends a datagram to IPv$6$ router F$.$ IPv$6$ datagrams are shown in blue; the IPv$4$ datagram is in red $($containing the encapsulated IPv$6$ datagram in blue$).$

Perform the matching below to indicate the datagram field value and type at point $($a$).$

IPv$6$

At point $($a$),$ the source IP

$2.$ A address is that of host:

At point $($a$),$ the destination

$3.F$

IP address is that of host:

$4.128$

At point $($a$),$ the IP version field in the datagram is:

$5.$ IPv$4$

At point $($a$),$ the number of

$6.B$ bits in the destination IP address is:

$7.32$

$8.D$