1. What is the destination mac-address of an ARP request frame

Broadcast

2. Is ARP used on a PPP link

No

3. What type of packet is a DHCP Discover packet

DHCP Discover is a layer 3 broadcast packets with destination IP address,

255.255.255.255

4. What is an IP Helper address feature and why is it required in a DHCP

environment

DHCP Discover packets are broadcast packets. This means that a DHCP Discover

packet which is sent from the client would not reach the DHCP Server, if the server

resides on a different network. This is because, routers are required for

communication between different networks and routers do not forward broadcast

packets. The IP Helper address feature is configured on the router. The feature

informs the router the DHCP Servers IP address for the network. So, when the router

receives the DHCP Discover packet, it would convert it from broadcast to unicast

packet and then send it to the DHCP Server.

5. If a computer is configured with a default gateway address, should the same

address be used as the DNS server IP address

It is not mandatory. The DNS server IP address can be any value provided the

computer has access to it.

6. What happens when you ping a DNS server IP address

A response to the ping is sent by the DNS server IP address.

7. How much data can be send in a Single FTP session

The amount of data which can be send is infinite. FTP uses TCP. The TCP channel

can be used until the complete data is transferred. Multiple TCP segments can be used

within the same TCP channel.

8. A user logs into a HTTPS based form on a website with his username and

password. Would the username or password be encrypted during the session

Both the username and password would be encrypted in a HTTPS based

communication.

9. Would the authentication between a HTTPS Web client and a Web Server be

successful if the client does not have a client certificate?

Authentication with client certificate is optional. The client can successfully

authenticate with the server using a username and password.

10. Does an IP v4 packet include subnet mask in the header

IP v4 header does not include subnet mask in the header

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