Deck 8: TCP/IP Internetworking I

Question 1

In the IPv4 address 1.2.3.4,what is the network part?

A) 1
B) 1.2
C) 1.2.3
D) We cannot say.

Answer 1

D

Question 2

The total length of an IPv4 address is ________ bits.

A) 8
B) 16
C) 32
D) 64

Answer 2

C

Question 3

If you see an IPv4 address,what do you know for certain?

A) the total length
B) the length of the network part
C) both A and B
D) neither A nor B

Answer 3

A

Question 4

The network part of an IPv4 address is ________ bits long.

A) 8
B) 16
C) 32
D) 64

Question 5

Express the mask /18 in dotted decimal notation.

A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) none of the above

Question 6

Ethernet standards are set at the ________.

A) physical layer
B) transport layer
C) both A and B
D) neither A nor B

Question 7

In the mask 255.255.255.0,how many 1s are there?

A) 8
B) 16
C) 24
D) 48

Question 8

Express the mask /24 in dotted decimal notation.

A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) none of the above

Question 9

In a subnet mask,the 1s correspond to the ________.

A) network part
B) subnet part
C) host part
D) all of the above

Question 10

UDP is a standard for ________.

A) packet delivery
B) supervision
C) both A and B
D) neither A nor B

Question 11

In the mask /14,how many 1s are there?

A) 8
B) 16
C) 24
D) none of the above

Question 12

Which of the following is one of the three parts of an IPv4 address?

A) subnet part
B) subnet mask
C) both A and B
D) neither A nor B

Question 13

TCP/IP standards are set at the ________.

A) physical layer
B) transport layer
C) both A and B
D) neither A nor B

Question 14

DNS is a ________ protocol.

A) packet delivery
B) supervisory
C) both A and B
D) neither A nor B

Question 15

A border router connects different IP ________.

A) subnets
B) networks
C) both A and B
D) neither A nor B

Question 16

In a network mask,the 1s correspond to the ________.

A) network part
B) subnet part
C) host part
D) Internet part

Question 17

An internal router connects different IP ________.

A) subnets
B) networks
C) both A and B
D) neither A nor B

Question 18

Router sockets for wire and optical fiber cords are called ________.

A) sockets
B) plugs
C) interfaces
D) ports

Question 19

For cost reasons,you should ________ where you can,________ where you must.

A) switch; switch
B) route; route
C) switch; route
D) route; switch

Question 20

A mask has ________ bits.

A) 8
B) 16
C) 32
D) 64

Question 21

The first step in the routing process involves ________.

A) selecting the best match row
B) comparing the packet's destination IP address to all rows
C) comparing the packet's destination IP address to matching rows
D) selecting an interface

Question 22

In a routing table,Rows 47 and 3497 both match the destination IP address of an arriving packet's IP address.What row will the router look at first when trying to find matching rows?

A) 1
B) 47
C) 3497
D) the default row

Question 23

The second step in the routing process involves ________.

A) selecting the best-match row
B) comparing the packet's destination IP address to all rows
C) comparing the packet's destination IP address to matching rows
D) selecting an interface

Question 24

A packet arrives at a router with destination IP address 62.17.3.2.Row 47 has the destination value 62.17.4.0.Is Row 47 a match?

A) Yes
B) No
C) impossible to determine

Question 25

In the final step,the router sends the packet ________.

A) to a particular device
B) out a particular interface
C) both A and B
D) neither A nor B

Question 26

The next-hop router listed in the last row is the ________ router.

A) local
B) best-match
C) socket
D) default

Question 27

The Internet is organized in a ________.

A) hierarchy
B) ring
C) mesh
D) none of the above

Question 28

In a routing table,a ________ represents a route for a group of IP addresses.

A) row
B) column
C) schema
D) metric

Question 29

If the next-hop router field in the best-match row says "local",the router should address the packet to the ________.

A) local router
B) default router
C) destination host
D) none of the above.

Question 30

There is a row for each host address in a(n)________.

A) routing table
B) Ethernet switching table
C) both A and B
D) neither A nor B

Question 31

Deciding what interface and to what device to send the packet back out is step ________ in the routing process.

A) 1
B) 2
C) 3
D) none of the above.

Question 32

A packet arrives at a router with destination IP address 128.171.3.2.Row 47 has the destination value 128.171.0.0.Is Row 47 a match?

A) Yes
B) No
C) impossible to determine

Question 33

If no other row matches,the router will select the ________ row as its best match.

A) First
B) Last
C) either A or B, depending on the circumstances
D) neither A nor B

Question 34

A(n)________ must find the best-matching row in its ________ table by comparing multiple row matches.

A) Ethernet switch; switching
B) router; routing
C) both A and B
D) neither A nor B

Question 35

Row 2707 has the mask /16 and the cost metric 20.Row 4400 has the mask /14 and the cost metric 10.The default row has a metric cost of 2.Which row will the router choose if both are matches?

A) 2707
B) 4400
C) 2
D) impossible to determine

Question 36

Router ports are called ________.

A) sockets
B) plugs
C) interfaces
D) ports

Question 37

If a router receives 20 packets in a row going to the same destination IP address,the standard calls for it to ________.

A) go through all three steps for each
B) use the decision it made for the first one
C) send them via different routers to create load balancing along different routes
D) none of the above

Question 38

For 100,000 addresses,which will have fewer rows?

A) a routing table
B) an Ethernet switching table
C) Both will be about the same number of rows.

Question 39

Row 2707 has the mask /16 and the reliability metric 20.Row 4400 has the mask /16 and the reliability metric 10.Which row will the router choose if both are matches?

A) 2707
B) 4400
C) either A or B
D) The router will choose the default row.

Question 40

If any row other than the default row matches an IPv4 address,the router will ________.

A) always choose the default row
B) sometimes choose the default row
C) never choose the default row
D) impossible to determine

Question 41

Which of the following allows packet fragmentation?

A) IPv4
B) IPv6
C) both A and B
D) neither A nor B

Question 42

The main benefit of IPv6 over IPv4 is ________.

A) having two more bits in the IP address
B) having two more bytes in the IP address
C) the ability to have quality-of-service guarantees
D) the ability to support more hosts

Question 43

For human reading,IPv6 addresses are written in ________ notation.

A) dotted decimal
B) hexadecimal
C) binary
D) all of the above

Question 44

Decision caching ________.

A) reduces routing costs
B) is safe
C) both A and B
D) neither A nor B

Question 45

In IPv6 addresses before simplification,there are ________ in a field.

A) 4 symbols
B) 16 bits
C) both A and B
D) neither A nor B

Question 46

In decision cashing,when 20 packets arrive to the same destination IP address,the router will ________.

A) go through all three steps for each
B) use the decision it made for the first one
C) send them via different routers to create load balancing along different routes
D) none of the above

Question 47

the identification field in IPv4 is used for ________.

A) route fragmentation
B) frame fragmentation
C) application message fragmentation
D) packet fragmentation

Question 48

The version of Internet Protocol that is growing rapidly is IP version ________.

A) 1
B) 2
C) 4
D) none of the above

Question 49

How many fields are there in an IPv6 address written for human reading?

A) 8
B) 16
C) 32
D) 128

Question 50

IPv6 addresses help to ________.

A) simplify writing
B) simplify memorization
C) both A and B
D) neither A nor B

Question 51

A router will discard a packet if the Time to Live (TTL)value in an arriving packet is ________.

A) 0
B) 1
C) 254
D) 256

Question 52

Which is a problem with IPv4 addresses?

A) They are incompatible with wireless devices.
B) They are too complex.
C) Routers find it difficult to handle them.
D) We have run out of them.

Question 53

In IPv6 addresses before simplification,there are ________ in a field.

A) 2 symbols
B) 8 bits
C) both A and B
D) neither A nor B

Question 54

The main version of Internet Protocol in use today is IP version ________.

A) 1
B) 4
C) 5
D) 6

Question 55

In IPv4,the ________ field is used to deal with congestion in the Internet.

A) ECN
B) DiffServ
C) time to live
D) header checksum

Question 56

In an IPv4 packet,the ________ field value tells the type of message contained in the IP packet's data field.

A) data
B) next-hop
C) next-header
D) protocol

Question 57

In IPv6 address simplification,text characters are expressed in ________.

A) upper case
B) lower case
C) either A or B
D) neither A nor B

Question 58

Simplification of IPv6 addresses must be standardized ________.

A) to maximize text compression
B) for the retrieval of IPv6 addresses in text fields of documents and spreadsheets
C) both A and B
D) neither A nor B

Question 59

In IPv6 addresses,________ are separated by ________.

A) segments; dots
B) segments; colons
C) fields; dots
D) fields; colons

Question 60

What is pushing IPv6 adoption now?

A) pressure from ISPs
B) pressure from the IETF
C) pressure from ISO
D) none of the above

Question 61

IPv6 uses ________ to know the packet length.

A) header length fields
B) total length fields
C) payload lengths
D) hop limits

Question 62

If I simplify the address 2001:0000:0000:00fe:0000:0000:0000:cdef,I get ________.

A) 2001:0:0:fe::cdef
B) 2001::fe:0:0:0:cdef
C) 2001:0:0:fe:0:0:0:cdef
D) 2001::00fe:0::cdef

Question 63

Using a header checksum field to check for errors ________.

A) increases routing time
B) decreases routing time
C) makes the protocol reliable
D) checks the entire packet to look for errors

Question 64

The diffserv field in IPv4 is for ________.

A) congestion
B) compression
C) quality of service
D) options

Question 65

TCP has ________ flag field(s).

A) 1
B) 2
C) 6
D) 9

Question 66

If I simplify the address 2001:0ed2:056b:00d3:00c0:abcd:0bcd:0fe0,I get ________.

A) 2001:ed2:56b:d3:c0:abcd:bcd:0fe0
B) 2001:ed2:56b:d3:c:abcd:bcd:0fe
C) either A or B
D) neither A nor B

Question 67

If someone says that a 1-bit flag is not set,this means its value is ________.

A) 0
B) 1
C) blank
D) We cannot say.

Question 68

In IPv6,the payload length gives the number of octets in the ________.

A) entire packet
B) entire packet minus the main header
C) entire packet minus the main and extension headers
D) entire packet minus the extension headers

Question 69

Which of the following checks for errors in the packet header?

A) IPv4
B) IPv6
C) both A and B
D) neither A nor B

Question 70

The packets in an IPv6 flow are handed ________.

A) sequentially
B) in parallel
C) in ripples
D) identically

Question 71

If I simplify the IPv4address 2001:0000:0000:00fe:3270:0000:0000:cdef.,I get ________.

A) 2001:0:0:00fe:3270:0:0:cdef
B) 2001::00fe:3270:0:0:cdef
C) 2001:0:0:00fe:3270::cdef
D) 2001::00fe:3270::cdef

Question 72

Sequence numbers are ________ bits long.

A) 8
B) 16
C) 24
D) 32

Question 73

If you see 0 in the Next Header Field of a header,what will follow this header?

A) hop-by-hop options
B) destination options
C) mobility header
D) none of the above

Question 74

________ are the only extension headers that all routers must consider.

A) Destination options
B) Mobility headers
C) Encapsulating security protocol headers
D) Hop-by-hop options

Question 75

The version number field in IPv6 has the value ________.

A) 0001
B) 0100
C) 0101
D) 0110

Question 76

The hop limit field in IPv6 corresponds to the ________ field in IPv4

A) header checksum
B) protocol
C) length
D) none of the above

Question 77

One-bit fields are called ________ fields.

A) SYN
B) flag
C) ACK
D) none of the above

Question 78

The terms payload and data field ________ in IPv6.

A) are synonymous
B) have nothing in common
C) are related but different
D) none of the above

Question 79

Which RFC standardizes how to write IPv6 addresses in canonical form?

A) RFC 791
B) RFC 2707
C) RFC 5952
D) RFC 7600

Question 80

Which has a better system for handling options beyond the main header?

A) IPv4
B) IPv6
C) Both use the same method.
D) Neither can handle options.