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CCNA Discovery Working at a Small-to-Medium Business or ISP (Version 4.1)
Chapter 7 With 100% Accurate Answers
1. Which two statements are true about the OSI and TCP/IP models?
(Choose two.)
The two bottom layers of the TCP/IP model make up the bottom layer of the
OSI model.
The TCP/IP model is a theoretical model and the OSI model is based on actual
protocols.
**The OSI network layer is comparable to the Internet layer of the TCP/IP
model.
The TCP/IP model specifies protocols for the physical network interconnection.
**The TCP/IP model is based on four layers and the OSI model is based on
seven layers.
2. To meet customer expectations, an ISP must guarantee a level of service
that is based on what two factors? (Choose two.)
accessibility
adaptability
**availability
**reliability
scalability
3. User1 is sending an e-mail to User2@cisco.com. What are two
characteristics of the process of sending this data? (Choose two.)
It utilizes TCP port 110.
A TCP connection is established directly between the User1 and User2 client
computers in order to send the e-mail message.
**It utilizes a store and forward process.
The same application layer protocol is used to send the e-mail and retrieve it
from the destination server.
**SMTP is used to send the e-mail message to the mail servers.
4. Refer to the exhibit. Host1 is in the process of setting up a TCP session
with Host2. Host1 has sent a SYN message to begin session establishment.
What happens next?
Host1 sends an ACK message to Host2.
Host1 sends a SYN message to Host2.
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Host1 sends a SYN-ACK message to Host2.
Host2 sends an ACK message to Host1.
Host2 sends a SYN message to Host1.
**Host2 sends a SYN-ACK message to Host1.
5. What are three characteristics of network reliability? (Choose three.)
**Redundant hardware provides enhanced reliability.
Reliability is measured as a percent.
Reliability is the responsibility of the ISP customers.
**Fault tolerance is