ENetwork Skill Exam Answers – CCNA 1 Exploration: Network Fundamentals v4.0

Take Assessment – ENetwork Skill Exam – CCNA Exploration: Network Fundamentals (Version 4.0) – Answers – 2011 – 2012

Note: s2/0 change to s0/0/0
Network Diagram, IP address =
A given network as in the diagram above, you need to perform the following tasks:
Section 1: Using VLSM to create the IP address plan

  • LAN1: 310 host addresses
  • LAN2: 200 host addresses
  • LAN3: 60 host addresses
  • LAN4: 40 host addresses
  • Loopback1: 30 host addresses
  • Loopback2: 10 host addresses
  • Wan link: 2 host addresses
Network Address Mask Des Mask
LAN1 /23
LAN2 /24
LAN3 /26
LAN4 /26
Loopback1 /27
Loopback2 /28
Wan link /30

Section 2: assign IP addresses, subnet masks and default gateways to the networking devices.
In each network, assign ip address follow this order
Address for interfaces of networking device (router’s interface) +1
Note: Address for interfaces of networking device with WAN link: router1 +1; router2 +2

  • Address for servers WEB, DHCP: +2
  • Address for servers MAIL, DNS: +3
  • Address for servers FTP, TFTP: +4
  • Address for PC clients
  • PC4: +4
  • PC5: +5
  • PC6: +6

Ex: In the subnetwork: (there are WEB, MAIL, TFTP, PC6)

  • Router’s interface:
  • WEB server:
  • MAIL server:
  • TFTP server:
  • PC6 client:
PC/Server IP address Subnet mask Default gateway DNS Server
Web www.cisco.com
Web www.test.com
Mail bkacad.com

Section 3: Using Packet Tracer to perform the tasks
Note: You need accuracy, distinguish capital letters and lowercase letters (for ex: bannermotd of router 1: router1, not Router1)
Basic router/switch configurations:
Hostnames: Assign the Routers names R1, R2.
Passwords & Banner Message: (Routers only).

  • Console and VTY lines and password, password=’class’.
  • Set the privileged mode password: enable password=’class’, enable secret password=’cisco’.
  • Banner contains the name of device: router1, router2. (type ‘#router1#’)

Routers interfaces:

  • Assign IP addresses and subnet masks
  • Use the clock rate 64000
  • Create descriptions, Interface description:
R1-f0/0 connect to lan1
R1-f1/0 connect to lan2
R2-f0/0 connect to lan3
R2-f1/0 connect to lan4
R1-loopback1 loopback1
R2-loopback2 loopback2
R1-s2/0 connect to r2
R2-s2/0 connect to r1

Static default route:

  • R1: (config)# ip route s2/0
  • R2: (config)# ip route s2/0

Backup configuration: Backup Router1/Router2 configuration on TFTP Server (server file name: R1-confg, R2-confg)

Router1 Router2
(config)#hostname R1 (config)#hostname R2
console password
(config)#line console 0
(config-line)#password class
VTY password
(config)#line vty 0 4
(config-line)#password class
privileged mode password
(config)#enable password class
(config)#enable secret cisco
(config)#banner motd #router1# (config)#banner motd #router2#
fa0/0 interface
(config)#interface fastEthernet 0/0
(config-if)#ip address
(config-if)#description connect to lan1
(config-if)#no shutdown
(config)#interface fastEthernet 0/0
(config-if)#ip address
(config-if)#description connect to lan3
(config-if)#no shutdown
fa1/0 interface
(config)#interface fastEthernet 1/0
(config-if)#ip address
(config-if)#description connect to lan2
(config-if)#no shutdown
(config)#interface fastEthernet 1/0
(config-if)#ip address
(config-if)#description connect to lan4
(config-if)#no shutdown
loopback interface
(config)#interface loopback 1
(config-if)#ip address
(config-if)#description loopback1
(config)#interface loopback 2
(config-if)#ip address
(config-if)#description loopback2
serial interface
(config)#interface serial 2/0
(config-if)#ip address
(config-if)#clock rate 64000
(config-if)#description connect to r2
(config-if)#no shutdown
(config)#interface serial 2/0
(config-if)#ip address
(config-if)#description connect to r1
(config-if)#no shutdown
default route
(config)# ip route s2/0
backup configuration
(config)#copy running-config tftp
Address or name of remote host []?

Configuring the Servers and PCs
Assign an IP address and Subnet mask, Default gateway
Active suitable services
Configuring the DNS server:

Name Type Address
bkacad.com A Record
ftp.test.com A Record
www.cisco.com A Record
www.test.com  A Record

Configuring the DHCP server:

  • Default Gateway:
  • DNS Server:
  • Start IP Address:
  • Subnet Mask:
  • Maximum number of users: 20
  • TFTP Server:

Configuring the MAIL server

  • Domain name: bkacad.com
  • Add users and passwords (user/pass):
    • pc1/cisco
    • pc4/cisco

Configuring the Mail client:

PC Email address Incoming and Outgoing mail server user pass
PC1 [email protected] bkacad.com pc1 cisco
PC4 [email protected] bkacad.com pc4 cisco

Send mail from pc1 to pc4 and check the result
Configuring the PC client:

  • PC0, PC1, PC2, PC3: Assign IP address, subnet mask, default gateway and DNS server address by DHCP server
  • PC4, PC5, PC6: Manual assign IP address, subnet mask, default gateway and DNS

Connectivity tests:

  • Ping from pc2 to pc5 to test whether the network operates successfully.
  • Ping from pc1 to ftp.test.com to check the connection to the ftp server.
  • Ping from pc1 to TFTP server to check the connection to the TFTP server.
  • Ping from pc1 to DNS to check whether the connection to the DNS server.
  • Ping from pc1 to Web: www.cisco.com to check the connection to the Web server.
  • Ping from pc1 to Web: www.test.com to check the connection to the Web server.
  • Ping from pc1 to Mail: bkacad.com to check the connection to the Mail server.
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