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Worksheetssheet 3
Total questions: 25
Worksheet time: 13mins
About the TTL field in the IPv4 header, which is correct?
When a route has a loop, the TTL value can be used to prevent the packet from being forwarded indefinitely.
The TTL value is reduced by 1 for each Layer 3 device.
The TTL value is 8 bits long.
The range of TTL values is 0-255
Which of the following statements about the TTL field in the IP packet header is correct?
Whenever a IP packet passes through a router, its TTL value is decremented by 1.
Whenever a IP packet passes through a router, its TTL value will be increased by 1.
TTL defines the time interval at which the source host can send packets.
TTL defines the number of packets that the source host can send.
Which fields are not included in the network layer header format?
TTL
Source IPv4 Address
Sequence Number
Destination IPv4 Address
The last option field of IPv4 is variable length optional information. What is the maximum length of this field?
40B
20B
60B
10B
An IPv4 packet header length field is 20B, and the total length field is 1500B, then what is the packet payload?
20B
1520B
1480B
1500B
Which of the following is unlikely to be the IPv4 packet header length?
20B
64B
60B
32B
Which of the following IPv4 addresses is a Class A address?
100.1.1.1
172.16.1.1
127.1.1.1
192.168.1.1
Which field in the IPv4 header is used to prevent a packet from traversing a network endlessly?
Time-to-Live
Sequence Number
Acknowledgment Number
Differentiated Services
What IPv4 header field identifies the upper layer protocol carried in the packet?
Protocol
Identification
Version
Differentiated Services
Which term describes a field in the IPv4 packet header used to identify the next level protocol?
protocol
destination IPv4 address
source IPv4 address
TTL
Which term describes a field in the IPv4 packet header that contains an 8-bit binary value used to determine the priority of each packet?
differentiated services
destination IPv4 address
source IPv4 address
protocol
Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?
source IPv4 address
destination IPv4 address
protocol
TTL
Which term describes a field in the IPv4 packet header used to detect corruption in the IPv4 header?
header checksum
source IPv4 address
protocol
TTL
How many times is the total length of an IPv6 address the length of an IPv4 address?
4
3
5
2
How many bits does the total length of an IPv6 address increase over IPv4?
32
96
64
128
What is the total length of an IPv6 address?
32
64
128
96
Which field of the IPv6 header can be used for QOS ?
Next Header
Payload Length
Traffic Class
Version
Which field in the IPv6 header acts like the TTL field in the IPv4 header?
Version
Traffic Class
Hop Limit
Next Header
If the IPv6 host wants to send packets up to 10 routers, which parameter should be modified in the IPv6 header?
Next Header
Version
Hop Limit
Traffic Class
What is the length of the Traffic Class field in the IPv6 Packet header?
4
8
2
6
Compared to IPv4, there is no IHL field in the IPv6 header.
TRUE
FALSE
The basic header length of an IPv6 message is a fixed value.
TRUE
FALSE
Which of the following field is/are contained in an IPv6 packet header?
Version
Traffic Class
Next Header
TOS
Which of the following field is added to the IPv6 packet header compared with the IPv4 packet header?
Source Address
Destination Address
Version
Flow Label
Which of the following fields are fields that exist in both IPv6 and IPv4 headers? (Multiple Choice)
Source Address
Version
Destination Address
Next Header
