
2 ccn
Authored by MUHAMMADAFFAN ALVI
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11th Grade
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
101.Which fields in the IPv4 header are related to fragmentation? (Multiple Choice)
A.TTL
B.Fragment Offset
C.Identification
D.Flags
Answer explanation
✅ B. Fragment Offset
YES — directly related to fragmentation.
This field tells the receiver where in the original packet the current fragment belongs.
Measured in 8-byte blocks (not bytes).
✅ C. Identification
YES — directly related to fragmentation.
All fragments of the same packet have the same Identification number.
This allows the receiver to reassemble fragments correctly.
✅ D. Flags
YES — directly related to fragmentation.
Contains 3 bits:
DF (Don't Fragment): If set, the packet cannot be fragmented.
MF (More Fragments): If set, it indicates that more fragments are coming.
Helps control and manage fragmentation behavior.
❌ A. TTL (Time To Live)
NO — not related to fragmentation.
TTL is used to prevent packets from looping forever in the network.
It counts down each time a router handles the packet, and drops it when it reaches zero.
YES — directly related to fragmentation.
This field tells the receiver where in the original packet the current fragment belongs.
Measured in 8-byte blocks (not bytes).
YES — directly related to fragmentation.
All fragments of the same packet have the same Identification number.
This allows the receiver to reassemble fragments correctly.
YES — directly related to fragmentation.
Contains 3 bits:
DF (Don't Fragment): If set, the packet cannot be fragmented.
MF (More Fragments): If set, it indicates that more fragments are coming.
Helps control and manage fragmentation behavior.
NO — not related to fragmentation.
TTL is used to prevent packets from looping forever in the network.
It counts down each time a router handles the packet, and drops it when it reaches zero.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
102.As shown in the figure below, which of the following statements are correct?
A. Host A can ping host B
B. Host A and Host B cannot obtain each other's MAC address
C. The following entry 10.0.12.5 MAC-B exists in the ARP cache of host A
D. The broadcast address of host A and host B are the same
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
103. As the figure shown: (Multiple Choice)
A. Client3 belongs to VLAN30, and the command for dividing VLAN on the switch is correct
B. Client4 belongs to VLAN40, and the command for dividing VLAN on the switch is correct
C. Client2 belongs to VLAN20, and the switch based on the MAC address division command is correct
D. Client1 belongs to VLAN10, and the command for dividing VLAN on the switch is correct
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
104.The load sharing mode at both ends of the Eth-Trunk can be inconsistent.
A.TRUE
B.FALSE
Answer explanation
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
105. When Huawei switches allow STP, the priority of the switch is by default:
A.32768
B.8192
C.16384
D.4096
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
106.As shown in the figure, the switch runs STP with default parameters, which of the following ports will
be elected as the designated port?
A. G0/0/1 port of switch A
B. Port G0/0/2 of switch A
C. HUB's G0/0/1 port
D. HUB's G0/0/2 port
Answer explanation
🖼️ Given Scenario (based on description):
There is a switch (SWA) connected to a HUB.
Ports involved:
G0/0/1 on SWA
G0/0/2 on SWA
HUB has two ports: G0/0/1 and G0/0/2 (but hubs are layer 1 devices and don’t participate in STP).
Since the hub is passive, the switches decide who will be the designated port for the shared segment.
🔍 Why Option A is Correct:
STP only runs on switches, not hubs.
The Designated Port is the switch port that is closest to the root on a segment.
Assuming both G0/0/1 and G0/0/2 are connected to the same collision domain (via the hub), and both belong to Switch A, the lower-numbered port (G0/0/1) is preferred.
There is a switch (SWA) connected to a HUB.
Ports involved:
G0/0/1 on SWA
G0/0/2 on SWA
HUB has two ports: G0/0/1 and G0/0/2 (but hubs are layer 1 devices and don’t participate in STP).
Since the hub is passive, the switches decide who will be the designated port for the shared segment.
STP only runs on switches, not hubs.
The Designated Port is the switch port that is closest to the root on a segment.
Assuming both G0/0/1 and G0/0/2 are connected to the same collision domain (via the hub), and both belong to Switch A, the lower-numbered port (G0/0/1) is preferred.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
107.What is the Solicited-node multicast address corresponding to IPv6 address 2019 :: 8:AB?
A.FF02 :: 1 :: FF08: AB
B.FF02 :: FF08: AB
C.FF02 :: 1 :: FF20: 19
D.FF02 :: 1 :: FE08: AB
Answer explanation
How to Build a Solicited-Node Address
The prefix FF02::1:FF is fixed.
The last 24 bits of the unicast or anycast IPv6 address are added to it.
🔍 Option Analysis:
A. FF02::1:FF08:AB → ✅ Correct
B. FF02::FF08:AB → ❌ Missing the ::1: part of the structure.
C. FF02::1:FF20:19 → ❌ Uses incorrect bits from the address.
D. FF02::1:FE08:AB → ❌ FE is wrong; it should be FF.
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