Download Quiz on ICND chapter 3

Quiz Chapter 3 – OSI – answer key
1-7.
8.
Name _______________________
Graded by_________________________
Name the seven layers of the OSI reference model, and describe their
main purpose.
a.
b.
All People Seem To Need Data Processing, 7-1
Please do no take sausage pizzas away, 7-1
c.
Application layer – provide standardized services to applications.
d.
Presentation – define data formats, compression, encryption
e.
Session – controls conversation between two end points.
f.
Transport - end-to-end error recovery, if requested.
g.
Network – logical addressing, routing routed protocols.
h.
Data Link – addressing for particular medium, protocols to
determine what devices access particular media at a given time.
i.
Physical – connector and cabling details, electronic signaling.
Describe data encapsulation, and use the OSI model in an example.
a.
b.
c.
d.
e.
f.
layer 7-5 – data
layer 4 – segment
layer 3 – packet or datagrams
layer 2 – frames
layer 1 – bits
each layer adds a header and possibly a trailer to data as it travels
down, dencapsulation strips the headers and trailers as it moves up the
layers.
9. Describe the features required to be considered connection-oriented and give
an example of a connection-oriented protocol.
a. The protocol must exchange messages to ensure proper data exchange.
TCP is an example.
10.
Are IP addresses defined by layer 2 or layer 3 protocol.
a. layer 3 OSI
11.
Describe the two portions of an IP address.
a. network, host
12.
Name the two main portions of a mac address.
a. vendor ID, vendor assigned number for the hardware device.
13.
Describe the differences between routing and routed protocols.
a. routers use a table defined by a routing protocol to define how routed
protocols are forwarded.
BONUS:
1.
(these questions may override any 2 wrong answers)
Give 1 example for each layer of the OSI model, example, layer 7 –
Telnet.
See book page 85 for examples.
2.
Have students turn to this page.
How many bits in a mac address, IP address, IPX address?
a. 48 – first 24 “burned in”, 32 – 4 8 bit “octets”, 80 - 32 network, 48
host