Answer: A,C,E 

Explanation: 

The given IP addresses of areas 1 and 3 along with network masks of /24 cannot accommodate 500 users so are inadequate, while the area 2 is having over capacity so its network mask can be reduced to /25 to accommodate the only 60 users it has. 

Answer: Specify appropriate devices and drag them on the "Device" boxes For the device at the bottom-right box, we notice that it has 2 interfaces Fa0/2 and Fa0/4; moreover the link connects the PC on the right with the device on the bottom-right is a straight-through link -> it is a switch The question stated that this topology contains 3 routers and 1 switch -> two other devices are routers Place them on appropriate locations as following: (Host D and host E will be automatically added after placing two routers. Click on them to access neighboring routers) Specify appropriate connections between these devices: 

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 The router on the left is connected with the Main router through FastEthernet interfaces: use a crossover cable 

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 The router on the right is connected with the Main router through Serial interfaces: use a 

serial cable 

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 The router on the right and the Switch: use a straight-through cable 

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 The router on the left and the computer: use a crossover cable (To remember which type of cable you should use, follow these tips: 

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To connect two serial interfaces of 2 routers we use serial cable 

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To specify when we use crossover cable or straight-through cable, we should remember: Group 1: Router, Host, Server Group 2: Hub, Switch One device in group 1 + One device in group 2: use straight-through cable Two devices in the same group: use crossover cable For example, we use straight-through cable to connect switch to router, switch to host, hub to host, hub to server... and we use crossover cable to connect switch to switch, switch to hub, router to router, host to host.) Assign appropriate IP addresses for interfaces: From Main router, use show running-config command. 

 (Notice that you may see different IP addresses in the real CCNA exam, the ones shown above are just used for demonstration) 

From the output we learned that the ip address of Fa0/0 interface of the Main router is 

192.168.152.177/28. This address belongs to a subnetwork which has: 

Increment: 16 (/28 = 255.255.255.240 or 1111 1111.1111 1111.1111 1111.1111 0000) 

Network address: 192.168.152.176 (because 176 = 16 * 11 and 176 < 177) 

Broadcast address: 192.168.152.191 (because 191 = 176 + 16 - 1) 

And we can pick up an ip address from the list that belongs to this subnetwork: 

192.168.152.190 and assign it to the Fa0/0 interface the router on the left Use the same method for interface Serial0/0 with an ip address of 192.168.152.161 Increment: 16 Network address: 192.168.152.160 (because 160 = 16 * 10 and 160 < 161) Broadcast address: 192.168.152.175 (because 176 = 160 + 16 - 1) -> and we choose 192.168.152.174 for Serial0/0 interface of the router on the right Interface Fa0/1 of the router on the left IP (of the computer on the left) : 192.168.152.129/28 Increment: 16 Network address: 192.168.152.128 (because 128 = 16 * 8 and 128 < 129) Broadcast address: 192.168.152.143 (because 143 = 128 + 16 - 1) -> we choose 192.168.152.142 from the list Interface Fa0/0 of the router on the right IP (of the computer on the left) : 192.168.152.225/28 Increment: 16 Network address: 192.168.152.224 (because 224 = 16 * 14 and 224 < 225) Broadcast address: 192.168.152.239 (because 239 = 224 + 16 - 1) -> we choose 192.168.152.238 from the list Let's have a look at the picture below to summarize Configure two routers on the left and right with these commands: Router1 = router on the left Assign appropriate IP addresses to Fa0/0 & Fa0/1 interfaces: Router1>enable Router1#configure terminal Router1(config)#interface fa0/0 Router1(config-if)#ip address 192.168.152.190 255.255.255.240 Router1(config-if)#no shutdown Router1(config-if)#interface fa0/1 Router1(config-if)#ip address 192.168.152.142 255.255.255.240 Router1(config-if)#no shutdown Set passwords (configure on two routers) 

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 Console password: Router1(config-if)#exit Router1(config)#line console 0 

Router1(config-line)#password consolepw Router1(config-line)#login Router1(config-line)#exit 

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 Telnet password: Router1(config)#line vty 0 4 Router1(config-line)#password telnetpw Router1(config-line)#login Router1(config-line)#exit 

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 Privilege mode password: Router1(config)#enable password privpw Save the configuration: Router1(config)#exit Router1#copy running-config startup-config Configure IP addresses of Router2 (router on the right) Router2>enable Router2#configure terminal Router2(config)#interface fa0/0 Router2(config-if)#ip address 192.168.152.238 255.255.255.240 Router2(config-if)#no shutdown Router2(config-if)#interface serial0/0 Router2(config-if)#ip address 192.168.152.174 255.255.255.240 Router2(config-if)#no shutdown Then set the console, telnet and privilege mode passwords for Router2 as we did for Router1, remember to save the configuration when you finished. 

Answer: A 

Explanation: 

Serial Connection 

cl_3_dte_male 

cl_2_dce 

The picture on the left shows a V.35 DTE cable with a male DB60 connector and a male standard 34-pin Winchester-type connector. The right picture shows a V.35 DCE serial cable with a male DB60 connector and a female 34-pin Winchester-type connector. As you probably guessed already, the male connector of the DTE cable is attached to the DCE cable's female connector, this is depicted in the picture below. This is known as a back-to-back connection, and 'simulates' a WAN link. In a real world setup, the DTE cable's male connector typically connects to a port on a CSU/DSU provided by a service provider (i.e. telco), which in turn connects to a CSU/DSU at another location, thru a T1 link for example. 

The DB60 connector connects to a Serial interface on a router. 

cl_4_malefemale Reference: http://www.techexams.net/techlabs/ccna/lab_hardware.shtml 

Answer: E 

Explanation: 

When frame receives the frame, it checks the source address on MAC table if MAC address found in MAC table it tries to forward if not in MAC table adds the Address on MAC table. After checking the source address, it checks the destination address on MAC table, if MAC address found on MAC table it forwards to proper ports otherwise floods on all ports except the source port. 

Answer: D 

Answer: B 

Explanation: 

Two VLANs require a router in between otherwise they cannot communicate. Different VLANs and different IP subnets need a router to route between them. 

Answer: D 

Explanation: 

Only network address contains this information. To transmit the packets the sender uses network address and datalink address. But the layer 2 address represents just the address of the next hop device on the way to the sender. It is changed on each hop. Network address remains the same. 

Answer: B 

Explanation: 

Hubs create single collision and broadcast domains, so in this case there will be a single collision domain for each of the two hubs. 

Answer: A,C,F 

Explanation: 

If port security is enabled and the port is only designated as access port, and finally static MAC address is assigned, it ensures that even if a physical connection is done by taking out the directory PC and inserting personal laptop or device, the connection cannot be made to the corporate network, hence ensuring safety. 

Answer: D 

Explanation: 

The default AD for a static route is 1. To change this, configure a different value to be used as the AD at the very end of the “ip route” statement.