Final Flashcards
RS-232 (Serial Ports) are
A. Only seen in old hardware
B. Still used even virtualized today
C. Not seen in modern equipment
D. Silly and should stop being used
Answer: B
SPI (Serial Peripheral Interface) bus is an example of which type of communication?
A. Synchronous
B. Asynchronous
C. Synchronicity
D. Parallel
Answer: A
RS232 or ‘Seral’ port use a common ground an
A. A master in slave out, a master out slave in, a clock
and a slave select
B. A data and a clock wire
C. A transmit and a receive wire
D. 8 data wires and one strobe wire
Answer: C
What is the highest later of the OSI 7-layer network protocol?
A. Application
B. Presentation
C. Data Link
D. Transport
Answer: A
Old ‘Parallel’ ports use a common ground and
A. 8 data wires and one strobe wire
B. A transmit and a receive wire
C. A master in slave out, a master out slave in, a clock
and a slave select
D. A data and a clock wire
Answer: A
If data is being transmitted at 9600 baud what is probably true about the wiring and hardware on both sides of the communication?
A. Must use Cat5 cable
B. The wires and hardware must be high quality
C. The wire and hardware can be poor quality
D. Must use Coaxial cable
Answer: C
TTL RS232 uses what voltage levels
A. 0V for 0 and 5V for 1
B. -3V for 0 and 3V for 1
C. -12V for 0 and 12V for 1
D. 5V for 0 and 0V for 1
Answer: A
I^2C is what kind of communication
A. Dumb
B. Synchronous
C. Asynchronous
D. Used for long distances
Answer: B
High speed data transmission requires
A. Better quality wire/fiber optics and less precisely timed
equipment
B. Better quality wire/fiber optics and more precisely
timed equipment
C. Lesser quality wire/fiber optics and more precisely
timed equipment
D. Lesser quality wire/fiber optics and less precisely
timed equipment
Answer: B
If you have a 10Mbps connection to your ISP you should expect
A. Between 100KBps and 1MBps download
B. Less than 100KBps download
C. More than 100KBps download
D. More than 1MBps download
Answer: A
A transmission approach that does have a separate clock line is said to be?
A. Synchronicity
B. Asynchronous
C. Synchronous
D. Unusable
Answer: C
SPI (Serial Peripheral Interface) has what baud rate?
A. Any
B. 1200
C. 300
D. 9600
Answer: A
What is the lowest layer of the OSI 7-layer network protocol?
A. Network
B. Physical
C. Data Link
D. Transport
Answer: B
SPI uses a common ground and
A. A master in slave out, a master out slave in, a clock
and a slave select
B. A data and a clock wire
C. A transmit and a receive wire
D. 8 data wires and one strobe wire
Answer: A
To convert bps to Bps a quick rule is to
A. Divide by 10
B. Divide by 8 because there is 8 bits in a byte
C. Divide by 4 because sync bits occur every 4 bits
D. Multiply by 8 because there is 8 bits in a byte
Answer: A
A transmission approach that does not have a separate clock line is said to be?
A. Synchronous
B. Asynchronous
C. Synchronicity
D. Unusable
Answer: B
A simple transition from zero to one includes how many frequencies?
A. Only two frequencies the first and second harmonic
B. Only one frequency because there is only one change
C. An infinite number
D. Only three frequencies the first, third, and fifth
harmonic
Answer: C
I^2C uses a common ground and
A. A transmit and a receive wire
B. A data and a clock wire
C. A master in slave out, a master out slave in, a clock
and a slave select
D. 8 data wires and one strobe wire
Answer: B
What is the minimum time it will take to transmit 2880 Bytes at 9600 baud?
A. 3(s)
B. .3(s)
C. 30(s)
D. Not enough information to computer an answer
Answer: A
A simple on/off signal on a wire at a fixed frequency contains
A. Is never distorted by the wire it is transmitted on
B. Infinite harmonics
C. Just the fixed frequency
D. Unchanged by surrounding magnetic fields
Answer: B
The port number for HTTP is?
A. 25
B. 80
C. 43
D. There is no port number
Answer: B
DD-WRT is firmware from
A. Stock firmware for a router
B. An open source community for consumer routers
C. From the company that made the routers
D. Chip manufacturers
Answer: B
A transmission approach that does not have a separate clock line is said to be?
A. Synchronicity
B. Asynchronous
C. Synchronous
D. Unusable
Answer: B
DHCP performs what operations for networked devices?
A. Converts names like www.google.com to ip addresses
B. Hands out ip addresses to new machines that connect
C. Transfers packets from one connection to another
D. Maps WAN ip addresses to LAN ip addresses
Answer: B
The C/C++ function ‘bind’ is the moment in code where the _____ gets exclusive hold of the socket?
A. Web browser
B. Server
C. Client
D. PING
Answer: B
Bits or bytes of information to verify that both sides of a communication have the same data at the end of reception are named?
A. Stop
B. Framing
C. CRC
D. Header
Answer: C
How many clients can connect on a socket on port 1025
A. Infinite or limited to number of process in the operating
system
B. 1 because it binds the socket
C. 2 because there is the server application as well
D. 65535 because it uses a two byte integer for
numbering the port
Answer: A
Which protocol has acknowledgements of Datagrams received?
A. IP
B. TCP
C. UDP
D. SMTP
Answer: B
How many servers can use a socket on port 1025
A. 1 because it binds the socket
B. 2 because there is the client application as well
C. Infinite or limited to number of process in the operating
system
D. 65535 because it uses a two byte integer for
numbering the port
Answer: A
The C/C++ function ‘connect’ is the moment in code where the _____ makes a connection over the network?
A. Server
B. Client
C. Web Browser
D. PING
Answer: B
If you want to send a packet of information over the network and your protocol does not care if it arrives you are probably using?
A. UDP
B. TCP
C. IP
D. SMTP
Answer: A
If data is being transmitted at 9600 baud what is probably true about the wiring and hardware on both sides of the communication?
A. The wires and hardware must be high quality
B. Must use Cat5 cable
C. The wire and hardware can be poor quality
D. Must use coaxial cable
Answer: C
DNS performs what operations for networked devices?
A. Transferes packets from one connection to another
B. Hands out ip addresses to new machines that connect
C. Converts names like www.google.com to ip addresses
D. Maps WAN ip addresses to LAN ip addresses
Answer: C
A router performs what operations for networked devices?
A. Hands out ip addresses to new machines that connect
B. Converts names like www.google.com to ip addresses
C. Transfers packets from one connection to another
D. Maps WAN ip addresses to LAN ip addresses
Answer: All of the above
NAT performs what operations for networked devices?
A. Maps WAN ip addresses to LAN ip addresses
B. Hands out ip addresses to new machines that connect
C. Converts names like www.google.com to ip addresses
D. Transfers packets from one connection to another
Answer: A
If you want to send a file over the network and the protocol preserves order of packets, you are probably using?
A. TCP
B. UDP
C. IP
D. SMTP
Answer: A
When a user copies a file over a network it is usually
A. Moved as one large packet of bytes
B. Chopped into pieces and sent in pieces
C. Not sent over a network
D. Compressed the bytes, then sent as one large packet
of bytes
Answer: B
Bits or Bytes of data to synchronize the timing on both sides of a communication channel are usually named?
A. Checksum
B. CRC
C. Framing
D. Header
Answer: C
Most networks today are of a ______ configuration?
A. Star
B. Ring
C. Cube
D. Square
Answer: A
What is special about port numbers less than 1024
A. Now are used only by root/super user accounts
B. Originally they were reserved for regular userservers
C. Originally they were reserved for root/super user
privileged servers
D. There is not special about port numbers less than 1024
Answer: C
