# Enhancing Data Security Through VLSM Subnetting and TCP/IP Model in an ENT
## 4 Results
### Proof of Configuration of EIGRP  
In entry D 192.168.5.0/25 [90/2684416] via 192.168.5.226, 02:13:26, Serial0/3/0 on the routing table of Router0 shown in Figure 13a, the letter D indicates that the routing protocol EIGRP was used to learn the destination, the administrative distance, the source, the next hop, and exit interface of the route. Thus, the destination network 192.168.5.0 has been attributed an administrative distance of 90 with a metric of 2684416. (The lower the value of this metric, the more suitable it is to follow). The next hop is 192.168.5.226 and the interface Serial0/3/0 is the exit interface through which the router will send the packets to reach the next hop (192.168.5.226). Lastly, the router's routing table was updated at time 02:13:26. The results of the successful configuration of EIGRP on Router1 and Router2 are also displayed in Figures 13b and 13c, respectively.  
Figure 12: (**a**) Location A pool DHCP successful configuration. (**b**) Location C pool DHCP successful configuration.  
Routerpenable  
Router&show ip route  
Codes: L - local, C - connected, S - static, R = RIP, M - mobile, B - BGP  
D - EIGRP, EX - EIGRP external, 0 - OSPF, IA - OSPF inter area  
N1 - OSPF NSA external type 1, N2 - OSPF NSA 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  
P - periodic downloaded static route  
Gateway of last resort is not set  
192.168.5.0/24 is variably submitted, 7 subnets, 5 masks  
D 192.168.5.0/25 [90/2684416] via 192.168.5.226, 01:15:34, Serial0/3/0  
D 192.168.5.128/26 [90/2684416] via 192.168.5.226, 01:15:34, Serial0/3/0  
C 192.168.5.192/27 is directly connected, Gigabit&thernet0/0  
L 192.168.5.193/32 is directly connected, Gigabit&thernet0/0  
C 192.168.5.224/30 is directly connected, Serial0/3/0  
L 192.168.5.225/32 is directly connected, Serial0/3/0  
D 192.168.5.228/30 [90/2681856] via 192.168.5.226, 01:15:34, Serial0/3/0  
(a)  
Routerpenable  
Router&show ip route  
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP  
D - EIGRP, EX - EIGRP external, 0 - OSPF, IA - OSPF inter area  
N1 - OSPF NSA external type 1, N2 - OSPF NSA 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  
P - periodic downloaded static route  
Gateway of last resort is not set  
192.168.5.0/24 is variably submitted, 7 subnets, 5 masks  
D 192.168.5.0/25 [90/2172416] via 192.168.5.230, 01:17:21, Serial0/3/1  
D 192.168.5.128/26 [90/2172416] via 192.168.5.230, 01:17:21, Serial0/3/1  
D 192.168.5.192/27 [90/2172416] via 192.168.5.225, 01:17:21, Serial0/3/0  
C 192.168.5.  
Router>enable  
Routerfshowiproute  
Codes:L=local,C=connected,S=static,R=RIP,M=mobile,B=BGP  
D=EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterareas  
N1=OSPFNSSAexternaltype1,N2-OSPFNSSAexternaltype2  
E1=OSPFexternaltype1,E2-OSPFexternaltype2,E-EGP  
i=IS-IS,L1-IS-ISlevel-1,L2-IS-ISlevel-2,is-IS-ISinter  
area  
*-candidatedefault,U=per-userstaticroute,o=OR  
P-periodicdownloadedstaticroute  
Gatewayoflastresortisnotset  
192.168.5.0/24 isvariablysubnetted,8 subnets,5 masks  
C192.168.5.0/25 isdirectlyconnected,GigabitEthernet0/1  
L192.168.5.1/32 isdirectlyconnected,GigabitEthernet0/1  
C192.168.5.128/26 isdirectlyconnected,GigabitEthernet0/0  
L192.168.5.129/32 isdirectlyconnected,GigabitEthernet0/0  
D192.168.5.192/27[90/2684416]via192.168.5.229,01:21:18,Serial0/3/0  
D192.168.5.224/30[90/2681856]via192.168.5.229,01:21:18,Serial0/3/0  
C192.168.5.228/30 isdirectlyconnected,Serial0/3/0  
L192.168.5.230/32 isdirectlyconnected,Serial0/3/0  
(c)  
**Figure 14**: _Cont._  
Figure 13: (**a**) Successfulconfiguration of EIGRP on Router0. (**b**) Successful configuration of EIGRP on Router1. (**c**) Successful configuration of EIGRP on Router2.