Ccna certification Practice Tests

284

 

Appendix 

■

  Answers to Practice Test Questions

Chapter 2: Network Access (Domain 2)

 1. D. The 

vlan.dat is the database for VLANs configured on a switch either manually or 

through VTP. It is persistent even if 

config.text (startup-configuration) is deleted. You 

must manually delete the 

vlan.dat. Upgrading the IOS will not delete the vlan.dat. 

Typing 

erase startup-config, confirming it, and reloading will not remove the current 

vlan.dat. Typing clear vlan will not remove the current vlan.dat.

 2.  A.  The normal usable VLAN range for Cisco is 1 through 1001. VLANS 1002 to 1005 

are reserved for Fiber Distributed Data Interface (FDDI) and Token Ring and cannot be 

deleted. The extended VLAN range is 1006 to 4096 used for Ethernet VLANs only.

 3.  C.  The flexibility of design for workgroups of clients, servers, services, etc. and the 

ongoing management of moving and adding people is a benefit of a routed VLAN-

enabled network. Migrating from a flat layer 2 network to a routed layer 3 network 

will not increase collision domains for increased bandwidth. When you add a layer 3 

routed infrastructure to your flat layer 2 network, the network complexity of design and 

operation will increase. You will increase the number of broadcast domains for increased 

bandwidth when you add multiple routed VLANs.

 4.  C.  The switch port is configured as a trunk, but since the computer was originally in 

VLAN 1 and the native VLAN of the interface is VLAN 1 by default, all traffic untagged 

was directed to the native VLAN. The command 

switchport nonegotiate will prevent 

the switch port from generating Dynamic Trunking Protocol (DTP) packets but will not 

prevent it from statically being assigned as a trunk link. The switch port will not form a 

trunk because the client is not configured to tag packets with 802.1q VLANs. Spanning-

tree prevents switching loops and does not assist in tagging packets or directing data onto 

VLANs.

 5.  C.  The extended VLAN range is VLAN 1006 to 4094. The normal usable VLAN range 

for Cisco is 1 through 1001. VLANS 1002 to 1005 are reserved for Fiber Distributed Data 

Interface (FDDI) and Token Ring and cannot be deleted.

 6.  C.  The command to delete VLAN 9 is 

no vlan 9 configured from a global configuration 

prompt. The command 

no vlan 9 configured from a VLAN prompt is incorrect. The 

command 

delete vlan 9 is incorrect. The command vlan 9 delete is incorrect.

 7.  D.  Frames with MAC addresses that are not in the MAC address table are flooded only to 

the ports in the respective VLAN. Broadcast frames will not be sent outside of the VLAN 

they originate from because they cannot traverse a router. Unicast frames are not flooded 

to all ports in all VLANs; they are only flooded to all ports in the VLAN the frame has 

originated from. The ports that link switches together are usually trunk links so that 

multiple VLANs can traverse the connection.

 8.  D.  The normal range of VLANs on a default Cisco switch is VLAN 1 to 1001. However, 

VLAN 1 cannot be modified, so option D is the correct answer. All other options are 

incorrect.

---

Chapter 2: Network Access (Domain 2)