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Netzwerke

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Fragengebiete 5 und 6. Fehler vorbehalten
ludwig.alwin
Quiz by ludwig.alwin, updated more than 1 year ago
ludwig.alwin
Created by ludwig.alwin about 9 years ago
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Resource summary

Question 1

Question
[blank_start]Application[blank_end] [blank_start]Presentation[blank_end] [blank_start]Session[blank_end] [blank_start]Transport[blank_end] [blank_start]Network[blank_end] [blank_start]Data-Link[blank_end] [blank_start]Physikal[blank_end]
Answer
  • Application
  • Presentation
  • Session
  • Transport
  • Network
  • Data-Link
  • Physikal

Question 2

Question
On which layers of the OSI model does a transceiver work? (Choose one):
Answer
  • Application
  • Data Link
  • Network
  • Transport
  • Physical

Question 3

Question
On which layers of the OSI model does a hub work? (Choose one):
Answer
  • Application
  • Data Link
  • Network
  • Transport
  • Physical

Question 4

Question
Which physical topology is used in the presence of a hub? (Choose one):
Answer
  • Mesh
  • Star
  • Bus
  • Ring
  • Extended star

Question 5

Question
On which layers of the OSI model does the switch work? (Choose two):
Answer
  • Application
  • Data Link
  • Network
  • Physical
  • Transport

Question 6

Question
Which physical topology is used in the presence of a switch? (Choose one):
Answer
  • Bus
  • Ring
  • Star
  • Extended star
  • Mesh

Question 7

Question
Which parameters are stored in the switching table of a switch? (Choose three):
Answer
  • Source MAC address of a frame
  • Destination MAC address of a frame
  • Type of frame
  • Port number
  • Frame Check Sequence FCS
  • Age of entry
  • IP-header

Question 8

Question
A switch has learned where a computer with a given MAC address is connected to, but looses this information later. What is the most probable reason of this behavior?
Answer
  • An administrator has deleted the entry
  • Flooding of a frame has deleted the entry
  • The connected computer has deleted the entry
  • Timer of switching table aged out
  • The destination MAC address of an errornous frame deleted the entry

Question 9

Question
What will the switch do in the MAC-table in the case of question 8? (Choose one):
Image:
9b2f8cc6-09b2-42a7-845d-4908de9d131e (image/jpeg)
Answer
  • Deleting entry for port Fa1
  • Inserting Destination MAC-address
  • Deleting entry for port Fa9
  • Restart the timer for port Fa1
  • Inserting source MAC-Adress
  • Restarting timer for port Fa9

Question 10

Question
What will the switch do in the MAC-table in the case of question 9 (auf dem bild steht 10 aber es ist das richtige Bild)? (Choose one):
Image:
8872bab0-c0e1-4b34-a8c1-c804410aea23 (image/jpeg)
Answer
  • Deleting entry for port Fa1
  • Inserting Destination MAC-address
  • Deleting entry for port Fa9
  • Restart the timer for port Fa1
  • Inserting Source MAC-address
  • Restarting the timer for port Fa9

Question 11

Question
Which organization is responsible for the global administration of network numbers of an IP address? (Choose one):
Answer
  • Local network administrator
  • NIC
  • CIA / NSA
  • RIPE
  • IANA /ICANN

Question 12

Question
Which facts hold for private IPv4 addresses? (Choose 3):
Answer
  • It does not access the physical network
  • It can be applied to isolated hosts which are not directly accessible from the global internet.
  • There are 3 IPv4 address ranges defined for private IP addresses.
  • 10.255.255.255 is a possible private IP network address.
  • 192.168.1.12 is a possible private IP host address.
  • 172.16.1.258 is a possible private IP host address.
  • 172.33.1.12 is a possible private IP host address.

Question 13

Question
Which of the following IPv4 host adresses are globally routable? Assume default subnet masks according to the network class. (Choose 3)
Answer
  • 194.168.1.0
  • 198.168.1.1
  • 180.168.1.255
  • 192.168.1.266
  • 11.12.13.14
  • 10.11.12.13
  • 172.16.1.1
  • 127.0.0.1

Question 14

Question
What is the dotted decimal representation of the following IPv4 address given in binary format (Chose one) 10100001.00111010.10101100.00001110
Answer
  • 160.58.172.14
  • 161.58.172.10
  • 161.58.172.14
  • 161.59.172.14
  • 161.58.171.10

Question 15

Question
Consider a classful IPv4 address with 16 bits network portion and 16 bits host portion. What statements hold for this type of address. (Choose four answers):
Answer
  • Class A address
  • Class B address
  • A possible network address is 200.201.0.0 .
  • A possible network address is 130.131.0.0 .
  • A possible network address is 80.81.0.0 .
  • Each network may have up to 255 hosts.
  • Each network may have up to 65 534 hosts.
  • The default subnet mask is 255.0.0.0 .
  • The default subnet mask is 255.255.0.0 .
  • The default subnet mask is 255.255.255.0 .

Question 16

Question
What is the range of valid IP addresses that can be assigned to hosts in the IP network with the network number 212.126.53 and default network mask. (Choose for 2)
Answer
  • First host address = 212.126.53.0
  • First host address = 212.126.53.1
  • First host address = 212.126.54.0
  • Last host address = 212.126.53.254
  • Last host address = 212.126.53.255
  • Last host address = 212.126.53.256

Question 17

Question
How can reflection in a copper cable be avoided (choose one):
Answer
  • Thicker wires
  • Impedance of attached network components must be equal to the impedance of the cable
  • Impedance of attached network components must be higher as the impedance of the cable
  • Impedance of attached network components must be smaller as the impedance of the cable
  • Thinner wires

Question 18

Question
What are types of noise (choose two):
Answer
  • Surrounding noise
  • Thermal noise
  • Resistance noise
  • Coil noise
  • Near-end crosstalk
  • Far-end thermal noise

Question 19

Question
How can thermal noise be decreased (choose one):
Answer
  • Never
  • Cooling of components
  • Smaller voltage
  • Smaller current
  • Metal housing

Question 20

Question
How can EMI reduced in a copper cable (choose two):
Answer
  • Metal housing
  • Shielding
  • Cooling
  • Thicker wires
  • Cancellation of electromagnetic fields
  • Cancellation of static electric fields

Question 21

Question
Which layers of the OSI-model are standardized by the IEEE (choose all that apply):
Answer
  • Layer 1
  • Layer 2
  • Layer 3
  • Layer 4
  • Layer 5

Question 22

Question
Which are fields of an Ethernet frame (choose three):
Answer
  • Preamble
  • Time to live TTL
  • Protocol
  • Type
  • Length
  • LLC
  • Source IP address
  • Destination MAC address

Question 23

Question
Which are fields of an IEEE 802.3-frame (choose three):
Answer
  • Time to live TTL
  • Offset
  • Length
  • Start of Frame Delimiter
  • Destination IP address
  • Source MAC address
  • Protocol

Question 24

Question
Choose all network layer protocols you know:
Answer
  • IPX
  • ATM
  • Ethernet
  • IP
  • TCP
  • ICPM
  • Apple Talk

Question 25

Question
Which protocols belong to the application layer? Click all that apply:
Answer
  • DECNET
  • POPv3
  • UDP
  • SIP
  • Telnet
  • Frame Relay
  • ISDN
  • HTTP

Question 26

Question
Which layers in the OSI- and TCP/IP model are identical in their functionality (choose two)?
Answer
  • Application
  • Data Link
  • Network
  • Session
  • Presentation
  • Transport
  • Network Access

Question 27

Question
Which functionality belongs to TCP (choose three):
Answer
  • Fast
  • Error detection only
  • Congestion control
  • Flow control
  • Unreliable
  • Reliable
  • Connection-less

Question 28

Question
Which functionality belongs to UDP (choose three):
Answer
  • Fast
  • Error correction
  • Congestion control
  • Flow control
  • Unreliable
  • Reliable
  • Connection-less

Question 29

Question
SIP is used for (choose two):
Answer
  • Transferring E-mails
  • Call establishment for IP-telephony
  • Download HTML-pages
  • Chatting
  • Signaling for IP-video
  • Wikis

Question 30

Question
Which layer describes end-to-end-delivery of segments (choose one):
Answer
  • Physical
  • Data Link
  • Network
  • Transport
  • Session
  • Presentation
  • Application

Question 31

Question
Which layer describes the delivery of frames (choose one):
Answer
  • Physical
  • Data Link
  • Network
  • Transport
  • Session
  • Presentation
  • Application

Question 32

Question
Which are protocols of the Data Link Layer (choose three):
Answer
  • TCP
  • IPX
  • Frame Relay
  • DNS
  • SIP
  • ATM
  • Ethernet

Question 33

Question
Which term describes Gnutella best?
Answer
  • Offline text-based communication service
  • Hierarchical file-sharing service
  • Peer-to-peer file-sharing service
  • Real-time text-based communications service
  • Collaboration tool
  • Tool for sending and receiving electronic mails
  • Tool for groups of people to edit and view web-pages together
  • Retrieval service for HTML-pages

Question 34

Question
Which term describes Wiki best?
Answer
  • Offline text-based communication service
  • Hierarchical file-sharing service
  • Peer-to-peer file-sharing service
  • Real-time text-based communication service
  • Collaboration tool
  • Tool for sending and receiving electronic mails
  • Tool for groups of people to edit and view web-pages together
  • Retrieval service for HTML-pages

Question 35

Question
Which term describes Instant Messaging best?
Answer
  • Offline text-based communication service
  • Hierarchical file-sharing service
  • Peer-to-peer file-sharing service
  • Real-time text-based communication service
  • Collaboration tool
  • Tool for sending and receiving electronic mails
  • Tool for groups of peoples to edit and view web-pages together
  • Retrieval service for HTML-pages

Question 36

Question
What describes SMB respectively SAMBA best?
Answer
  • Short-term file-sharing tool in a client-server architecture
  • Tool for chatting
  • Long-term file-sharing tool in a peer-to-peer architecture
  • Tool for weblog
  • Long-term file-sharing tool in a client-server architecture
  • Short-term file-sharing tool in a peer-to-peer architecture

Question 37

Question
What is the disadvantage of a connection-less network?
Answer
  • Fast
  • Error-recovery
  • Retransmission
  • Sender does not know if receiver is operable
  • Messages cannot get lost without notification of receiver

Question 38

Question
What are features of the internet (choose three):
Answer
  • It requires a connection oriented network for all applications
  • Data packets can travel multiple paths through the network
  • It allows for billing of network by the amount of time a connection is established
  • It can rapidly adapt to the loss of data transmission facilities
  • It efficiently utilizes the network infrastructure to transfer data

Question 39

Question
What are the features of peer-to-peer networks (choose two)?
Answer
  • Only a small server is needed
  • Clients run a dedicated server software
  • High bit-rates are possible
  • No management procedures are necessary
  • Each machine is client and server

Question 40

Question
Which devices are network devices (choose all that apply):
Answer
  • PC
  • Access point
  • Printer
  • Router
  • Switch
  • Laptop
  • Firewall

Question 41

Question
Which media technologies in communication networks do you know (choose three)?
Answer
  • Video
  • Copper cable
  • Circuit
  • Wireless
  • Fiber
  • MPEG4
  • MP3

Question 42

Question
Calculate the number of possible connections between 8 nodes in a full mesh network: [blank_start]28[blank_end]
Answer
  • 28

Question 43

Question
Calculate the number of possible connections between 6 nodes in a full mesh network: [blank_start]15[blank_end]
Answer
  • 15

Question 44

Question
Calculate the decimal value of the binary number 10101011(binary): [blank_start]171[blank_end]
Answer
  • 171

Question 45

Question
Calculate the binary number of decimal 158dec: [blank_start]10011110[blank_end]
Answer
  • 10011110

Question 46

Question
Calculate the hex value of the following 12 bits: 1011 1001 1110: [blank_start]B9E[blank_end]
Answer
  • B9E

Question 47

Question
Calculate the decimal value of the hexadecimal number: 11Ahex: [blank_start]282[blank_end]
Answer
  • 282
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