OSI & TCP/IP Model

Question 1
Where does routing occur within the DoD TCP/IP reference model?
A. application
B. internet
C. network
D. transport

Question 2
Refer to exhibit.

Router#show running-config
Building configuration…
Current configuration : 659 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
service password-encryption
!
hostname Router
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
ip access-group 101 in
duplex auto
speed auto
!
access-1ist 101 deny tcp any any eq 22
access-1ist 101 permit ip any any
!
line con 0
password 7 0822455D0A16
login
line vty 0 4
login
line vty 5 14
login
!
end

A network administrator cannot establish a Telnet session with the indicated router. What is the
cause of this failure?
A. A Level 5 password is not set.
B. An ACL is blocking Telnet access.
C. The vty password is missing.
D. The console password is missing.

Question 3
Before installing a new, upgraded version of the IOS, what should be checked on the router, and
which command should be used to gather this information? (Choose two)
A. the amount of available ROM
B. the amount of available flash and RAM memory
C. the version of the bootstrap software present on the router
D. show version
E. show processes
F. show running-config

Question 4
Refer to the exhibit. An administrator pings the default gateway at 10.10.10.1 and sees the output as
shown. At which OSI layer is the problem?

C:\> ping 10.10.10.1
Pinging 10.10.10.1 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 10.10.10.1:
Packets: sent – 4, Received = 0, Lost – 4 (100% loss)

A. data link layer
B. application layer
C. access layer
D. session layer
E. network layer

Question 5
At which layer of the OSI model does PPP perform?
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5

Question 6
Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)
A. The transport layer divides a data stream into segments and may add reliability and flow control
information.
B. The data link layer adds physical source and destination addresses and an FCS to the segment.
C. Packets are created when the network layer encapsulates a frame with source and destination host
addresses and protocol-related control information.
D. Packets are created when the network layer adds Layer 3 addresses and control information to a
segment.
E. The presentation layer translates bits into voltages for transmission across the physical link.

Question 7
A network administrator is verifying the configuration of a newly installed host by establishing an
FTP connection to a remote server. What is the highest layer of the protocol stack that the network
administrator is using for this operation?
A. application
B. presentation
C. session
D. transport
E. internet
F. data link

Question 8
At which layer of the OSI model is RSTP used to prevent loops?
A. data link
B. network
C. physical
D. transport

Question 9
Which layer in the OSI reference model is responsible for determining the availability of the
receiving program and checking to see if enough resources exist for that communication?
A. transport
B. network
C. presentation
D. session
E. application

Question 10
A receiving host computes the checksum on a frame and determines that the frame is damaged. The
frame is then discarded. At which OSI layer did this happen?
A. session
B. network
C. physical
D. data link
E. transport

(Sưu tầm)