Cisco – show ip route shows interface with /32 subnet mask

I am new to networking, and currently studying about how router learn different routes.
One of my lecture slides shows the following,

First of all, please have a look at this network,

I know that link local is created in the routing table when interface is configured, and connected is created when an interface is active.

Now, I tried the same scenario in Packet Tracer and here is what I got when i type show ip route command,

Router#show ip route 
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

C    192.168.10.0/24 is directly connected, FastEthernet0/0

My question is,

If the interface is active why there is still two entries (C and L) in routing
table (in the photo), and just single C entry in my network ?
How come the diagram shows the ip address for link local
with subnet mask of 32 because when I tried assigning ip address with /32 subnet mask to this interfacce, I got bad mask error ?

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override

Best Answer

Assigning a /32 to an interface that connects to something else doesn't make any sense. You can assign the /32 to a loopback interface:

interface Loopback0
 ip address 192.168.1.1 255.255.255.255

If you want to assign the 192.168.10.1 address to the GigabitEthernet0/0 interface which uses 192.168.10.0/24:

interface GigabitEthernet0/0
 ip address 192.168.10.1 255.255.255.0

This results in the network 192.168.10.0/24 entry in the routing table as a connected route (C). I suppose it depends on the IOS version, but you can also get a local (not link local which is something else, entirely) route to the specific (/32) address assigned to an interface in your router. My IOS does this. The version you have doesn't show the L in the codes, whereas mine does as the first entry: