CS4500/7070 Advanced Networking Protocols, Test1 – Study Guide

CS4500/CS7070 Advanced Networking Protocols, Test1 – Study Guide
[June 2015]
1.Which ATM Layer specifies how user data should be packaged into cells? a) physical b) ATM c) Application adaptation d) Data adaptation
2.Which ATM layer has a cell as an end product?
a) physical b) ATM c) Application adaptation d) Cell transformation
3.Which application adaptation layer type can process a data stream having a non- a) AAL1 b) AAL2 c) AAL3/4 d) AAL5
4.A ______ ATM LAN could have Ethernet ---- an ATM Switch.
a) pure b) legacy
c) mixed architecture d) b and c

5. PPP is a __C____ layer protocol.

a) physical
b) data link
c) physical and data link.
d) seven
6.Per OSI, Repeaters operate at layer 1 only? True
7.Per OSI, Bridges operate at layer 2 only? False
8.Per OSI, Routers operate at Layer 3 only? False
9.Routers use the destination computer when forwarding a packet. False
10.When data is transmitted from device A to device B, the header from A’s layer 5 is ready by Layer B’s ______ layer.
Session
11.3 factors relating to CSMA/CD data rate, maximum frame length and collision detection. False
12.Select the false statement(s) – if no false statements, select (f)
Answer(these are all true statements)
a)because a connectionless service usually maps directly onto the underlying hardware….
b)connectionless service guarantees reliable, in-order delivery.
c)Universal interconnection handles such problems as transmission errors, lost packets, switches along the path between the sender and receiver.
d)TCP/IP protocols define the unit of data transmission, called a datagram, and specify on a particular network.
e)TCP/IP protocols include standards for many common applications including electronic remote login.
f)these are all true statements
13. The IAB is broken into what major organizations (select all …)
a) Internet Engineering Task Force b) ISOC c) Research Internet Alliance Team d) All organizations listed above are a part of the IAB
14. The TCP/IP protocols treat all networks equallyTrue
15. From the ISO 7-Layer reference model, which layer provides end-to-end reliability by having the destination host communication with the source host?
a) 2 b) 4
c) 5
d) 6
16. Which layer of the 5-layer handles communication from one machine to another? a) Application b) Transport c) Network d) Network Interface e) Hardware
17.Ultimately, all internet communication involves IP datagramsTrue
18.Match the functions to one of the OSI Layers. Use the following acronyms for each layer: A-Application, Pr- Presentation, S-Session, T-Transport, N-Network, D-Data Link and Ph-Physical. Must specify the direction the function is occurring, whether the function is occurring Up through the layer (U) or Down (D) through the layer. BOTH THE LAYER AND DIRECTION MUST BE CORRECT TO GET CREDIT. (2 points each for fully correct answer) – must follow directions in general in getting credit for this problem.

Layer Function
Layer
U/D

1
perform format and code conversion services
Pr
U
1
2
evaluate request to establish a session
S
U
2
3
performs segmentation on messages
T
D
3
4
evaluates whether packet has arrived to the correct hop


4
5
establish code format
Pr
D
5
6
request synchronization with receiver
S
D
6
7
send information to adjacent node


7
8
determine next hop


8
9
adhere to flow control request on bits
D
U
9
10
converting bits to signals
Ph
D
10
11
creating checksum for messages segments


11
12
transitioning of user datagrams to IP datagrams


12
13
uses the port number in targeting process


13
14
dictates flow control on messages


14
19.Given an original bandwidth need of “x”, if DSSS makes use of a 7-bit chip-code, how large must the bandwidth be to support DSSS? (4pts)
20.From an ATM perspective, what does ‘connection-oriented” versus “connectionless” mean (examples)?? Only answer in the space below. (5pts)
21.Suppose there is heavy traffic on both a 10Mbps Ethernet LAN and a LAN and a 10Mbps Token Ring LAN. A station on which LAN is more likely to wait longer to send a frame? Why? Answer must be precise – only use space below.
22.Given a fictitious 4-layered protocol reference model with 8 protocols per layer, (a) how many stacks are there?
(b) How many suites? 4 Suites
23.A particular Ethernet network’s frame size ranges from 1600 bits to 24000 bits. The Ethernet’s
frame has a data rate of 0.40kbps. How many milliseconds does each node have to wait before sensing if detected on the medium?
24.Imagine the length of a 10BASE5 cable is 2500 meters. If the speed of propagation …. Cable is
200,000,000 meters/second (a) how many milliseconds does it take for a bit to travel […] beginning to the end of the network? Ignore any propagation delay in the equipment. (b) find the maximum time it takes to sense a collision. The worst case occurs when data are sent from one cable and the collision happens at the other end. Remember that the signal needs to make a round trip.
25.An Ethernet MAC sublayer has 42 bytes of data from the LLC sublayer. How many bytes of padding must be added?
26.An Ethernet MAC […] encapsulated in one […] frame?

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