DRAG DROP
On the left are various network protocols. On the right are the layers of the TCP/IP model. Assuming a reliable connection is required, move the protocol on the left to the TCP/IP layer on the right to show the proper encapsulation for an email message sent by a host on a LAN. (Not all options are used)
Answer: 
Explanation:
So would UDP not be an acceptable match for transport layer? If not, Why not?
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In this exercise, we are seding an email, therefore SMTP will be use and it uses a TCP port during a communication which is TCP port 25
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nevermind. “Assume a reliable connection is required”
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Why not arp on the network access layer?
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ARP is encapsulated within an Ethernet frame
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id say aplication layer = SMTP SNMP
transpot layer = UDP TCP
internet layer = ip arp
network access layer = Ethernet and Arp
arp we could say works on internet layer but works on access layer too
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QUESTION 151
Which layer of the TCP/IP stack combines the OSI model physical and data link layers?
A. Internet layer
B. transport layer
C. application layer
D. network access layer
Correct Answer: D
QUESTION 152
Which protocol uses a connection-oriented service to deliver files between end systems?
A. TFTP
B. DNS
C. FTP
D. SNMP
E. RIP
Correct Answer: C
QUESTION 153
Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required?
A. HTTP
B. IP
C. TCP
D. Telnet
E. UDP
Correct Answer: E
Section: (none)
Explanation
Explanation/Reference:
UDP provides a connectionless datagram service that offers best-effort delivery, which means that UDP does not guarantee delivery or verify sequencing for any
datagrams.A source host that needs reliable communication must use either TCP or a program that provides its own sequencing and acknowledgment services.
QUESTION 154
Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments?
A. Physical
B. Data-link
C. Transport
D. Network
Correct Answer: C
QUESTION 155
Which statements are true regarding ICMP packets? (Choose two.)
A. They acknowledge receipt of TCP segments.
B. They guarantee datagram delivery.
C. TRACERT uses ICMP packets.
D. They are encapsulated within IP datagrams.
E. They are encapsulated within UDP datagrams.
Correct Answer: CD
QUESTION 156
What must occur before a workstation can exchange HTTP packets with a web server?
A. A UDP connection must be established between the workstation and its default gateway.
B. A UDP connection must be established between the workstation and the web server.
C. A TCP connection must be established between the workstation and its default gateway.
D. A TCP connection must be established between the workstation and the web server.
E. An ICMP connection must be established between the workstation and its default gateway.
F. An ICMP connection must be established between the workstation and the web server.
Correct Answer: D
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