Cisco CCNA 200-301 Questions & Answers

• Question 31:

  Refer to the exhibit. Which two statements about the interface that generated the output are true? (Choose two.)

  

  A. learned MAC addresses are deleted after five minutes of inactivity

  B. the interface is error-diabled if packets arrive from a new unknown source address

  C. it has dynamically learned two secure MAC addresses

  D. it has dynamically learned three secure MAC addresses

  E. the security violation counter increments if packets arrive from a new unknown source address

  Correct Answer: AC

  B - wrong. only shuts int when violation mode is "shutdown" D - wrong. dynamically learned only 2 MACADD using sticky command E - wrong. only increments on "restrict" and "shutdown" violation mode

• Question 32:

  Refer to the exhibit. Which two events occur on the interface, if packets from an unknown Source address arrive after the interface learns the maximum number of secure MAC address? (Choose two.)

  

  A. The security violation counter dose not increment

  B. The port LED turns off

  C. The interface is error-disabled

  D. A syslog message is generated

  E. The interface drops traffic from unknown MAC address

  Correct Answer: AE

  Protect - When a violation occurs in this mode, the switchport will permit traffic from known MAC addresses to continue sending traffic while dropping traffic from unknown MAC addresses. When using this mode, no notification message is sent when this violation occurs.

• Question 33:

  Refer to the exhibit. Which two statements about the network environment of router R1 must be true? (Choose two.)

  

  A. There are 20 different network masks within the 10.0.0.0/8 network.

  B. A static default route to 10.85.33.14 was defined

  C. Ten routes are equally load-balanced between Te0/1/0.100 and Te0/2/0.100

  D. The 10.0.0.0/8 network was learned via external EIGRP

  E. The EIGRP administrative distance was manually changed from 90 to 170

  Correct Answer: AC

• Question 34:

  Refer to the exhibit. Which two statements are true about the loopback address that is configured on RouterB? (Choose two.)

  

  A. It ensures that data will be forwarded by RouterB.

  B. It provides stability for the OSPF process on RouterB.

  C. It specifies that the router ID for RouterB should be 10.0.0.1.

  D. It decreases the metric for routes that are advertised from RouterB.

  E. It indicates that RouterB should be elected the DR for the LAN.

  Correct Answer: BC

  A loopback interface never comes down even if the link is broken so it provides stability for the OSPF process (for example we use that loopback interface as the router-id) - The router-ID is chosen in the order below:

  + The highest IP address assigned to a loopback (logical) interface.+ If a loopback interface is not defined, the highest IP address of all active router's physical interfaces will be chosen. -> The loopback interface will be chosen as the router ID of RouterB ?

• Question 35:

  Refer to the exhibit.

  

  Which switch in this configuration becomes the root bridge?

  A. SW1

  B. SW2

  C. SW3

  D. SW4

  Correct Answer: C

  Root bridge > switch with lowest BID. The BID (bridge ID) is composed by the switch priority and by its MAC address. Since the question doesn't mention any priority, just focus on the MAC addresses and compare them “hex value- to-hex value”, starting from left to right:

  Switch 1 – 0C:E0:38:41:86:07 Switch 2 – 0C:0E:15:22:05:97 Switch 3 – 0C:0E:15:1A:3C:9D Switch 4 – 0C:E0:18:A1:B3:19

  The first two values are equal for all MAC addresses. Starting from the 3rd value, Switch 2 and Switch 3 have a MAC address which is lower than Switch 1 and Switch 4. Starting from the 7th value, you can see that Switch 3 is lower than Switch 4.

• Question 36:

  Which two are features of IPv6? (Choose two.)

  A. anycast

  B. broadcast

  C. multicast

  D. podcast

  E. allcast

  Correct Answer: AC

  IPv6 addresses are classified by the primary addressing and routing methodologies common in networking: unicast addressing, anycast addressing, and multicast addressing. A unicast address identifies a single network interface. The Internet Protocol delivers packets sent to a unicast address to that specific interface. An anycast address is assigned to a group of interfaces, usually belonging to different nodes. A packet sent to an anycast address is delivered to just one of the member interfaces, typically the nearest host, according to the routing protocol's definition of distance. Anycast addresses cannot be identified easily, they have the same format as unicast addresses, and differ only by their presence in the network at multiple points. Almost any unicast address can be employed as an anycast address. A multicast address is also used by multiple hosts, which acquire the multicast address destination by participating in the multicast distribution protocol among the network routers. A packet that is sent to a multicast address is delivered to all interfaces that have joined the corresponding multicast group.

• Question 37:

  In which two formats can the IPv6 address fd15:0db8:0000:0000:0700:0003:400F:572B be written? (Choose two.)

  A. fd15:0db8:0000:0000:700:3:400F:527B

  B. fd15::db8::700:3:400F:527B

  C. fd15:db8:0::700:3:4F:527B

  D. fd15:0db8::7:3:4F:527B

  E. fd15:db8::700:3:400F:572B

  Correct Answer: AE

• Question 38:

  Refer to the exhibit.

  

  The MAC address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch. What two operations will the switch perform when it receives this frame? (Choose two.)

  A. The switch will not forward a frame with this destination MAC address.

  B. The frame will be forwarded out of all the ports on the switch.

  C. The MAC address of ffff.ffff.ffff will be added to the MAC address table.

  D. The frame will be forwarded out of all the active switch ports except for port fa0/0.

  E. The MAC address of 0000.00aa.aaaa will be added to the MAC Address Table.

  F. The frame will be forwarded out of fa0/0 and fa0/1 only.

  Correct Answer: DE

• Question 39:

  Which IPv6 address is the equivalent of the IPv4 interface loopback address 127.0.0.1?

  A. ::1

  B. ::

  C. 2000::/3

  D. 0::/10

  Correct Answer: A

  In IPv6 the loopback address is written as, ::1

  This is a 128bit number, with the first 127 bits being '0' and the 128th bit being '1'. It's just a single address, so could also be written as ::1/128.

• Question 40:

  Which command enables IPv6 forwarding on a Cisco router?

  A. ipv6 local

  B. ipv6 host

  C. ipv6 unicast-routing

  D. ipv6 neighbor

  Correct Answer: C

  To enable IPv6 routing on the Cisco router use the following command:

  ipv6 unicast-routing

  If this command is not recognized, your version of IOS does not support IPv6.