Which of the following statements is true about the TTL field in an IP packet header?

• A.This field is used to display packet priorities.
• B.The length of this field is 7 bits.
• C.This field is used to prevent packets from looping.
• D.This field is used to fragment packets.

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When a router forwards a packet, if it does not match the corresponding detail route and there is no default route, the router will discard the packet directly.

• A.False
• B.True

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The output information of a switch is as follows. Which of the following statement is correct? (Multiple choice)

• A.The user manually created 4 VLANs.
• B.When the GE0/0/1 port of the switch sends the data frame of VLAN 20, it does not carry the VLAN TAG.
• C.When the GE0/0/1 port of the switch sends the data frame of VLAN 10, it does not carry the VLAN TAG.
• D.When the GE0/0/2 port of the switch sends the data frame of VLAN 20, it carries the VLAN TAG.

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The administrator wants to upgrade the configuration file for the AR2200 through the USB cable. Which is correct? (Muitiple choice)

• A.Connect the USB interface of the PC and AR2200 with mini USB cable.
• B.The AR2200 does not support the use of USB to update configuration files.
• C.After connecting the cable, the administrator needs to install the driver for the mini USB.
• D.Connect the mini USB cable of the PC and AR2200 with mini USB cable.

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A network administrator has been assigned the IP address segment 192.168.176.0/25, from which he/she must allocate a subnet to support 20 users in the marketing department.
Which IP subnet best supports this requirement?

• A.192.168.176.0/30
• B.192.168.176.96/27
• C.192.168.176.48/29
• D.192.168.176.0/25

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