300-101 | A Review Of Free 300-101 practice test

Question No: 10

Which two statements about 6to4 tunneling are accurate? (Choose two.)

A. Prepending a reserved IPv6 code to the hexadecimal representation of 192.168.0.1 facilitates 6to4 tunneling.

B. Each 6to4 site receives a /48 prefix in a 6to4 tunnel.

C. 2002::/48 is the address range specifically assigned to 6to4.

D. Prepending 0x2002 with the IPv4 address creates an IPv6 address that is used in 6to4 tunneling.

E. 6to4 is a manual tunnel method.

Answer: B,D

Question No: 11

Which parameter in an SNMPv3 configuration offers authentication and encryption?

A. auth

B. noauth

C. priv

D. secret

Answer: C

Question No: 12

Refer to the exhibit.

How would you confirm on R1 that load balancing is actually occurring on the default- network (0.0.0.0)?

A. Use ping and the show ip route command to confirm the timers for each default network resets to 0.

B. Load balancing does not occur over default networks; the second route will only be used for failover.

C. Use an extended ping along with repeated show ip route commands to confirm the gateway of last resort address toggles back and forth.

D. Use the traceroute command to an address that is not explicitly in the routing table.

Answer: D

Explanation:

The most simple method to test load balancing is to use the u201ctracerouteu201d command. If load balancing is working correctly, we will see different paths to reach the destination each time

we use that command.

Unknown address will be routed via the default-network 0.0.0.0 so we must use an address that is not explicitly in the routing table.

Question No: 13

Which mode of uRPF causes a router interface to accept a packet, if the network to which the packetu2021s source IP address belongs is found in the routeru2021s FIB?

A. Strict mode

B. Loose mode

C. Auto mode

D. Desirable mode

Answer: B

Explanation:

EXPLANATION/REFRENCE

A number of common types of DoS attacks take advantage of forged or rapidly changing source IP addresses, allowing attackers to thwart efforts by ISPs to locate or filter these attacks. Unicast RPF was originally created to help mitigate such attacks by providing an automated, scalable mechanism to implement the Internet Engineering Task Force (IETF) Best Common Practices 38/Request for Comments 2827 (BCP 38/RFC 2827) anti-spoofing filtering on the customer-to-ISP network edge. By taking advantage of the information stored in the Forwarding Information Base (FIB) that is created by the CEF switching process, Unicast RPF can determine whether IP packets are spoofed or malformed by matching the IP source address

and ingress interface against the FIB entry that reaches back to this source (a so-called reverse lookup). Packets that are received from one of the best reverse path routes back out of the same interface are forwarded as normal. If there is no reverse path route on the sam e interface from which the packet was received, it might mean that the source address was modified, and the packet is dropped (by default).

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_data_urpf/configuration/xe-3s/sec-data-urpf-xe-3s-book/sec-unicast-rpf-loose-mode.html?referring_site=RE&pos=1&page=http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/srpf_gsr.html#GUID-FFFA94D5- EEFB-4215-9EE1-DB37CD01C2CA

Question No: 14

Which type of handshake does CHAP authentication use to establish a PPP link?

A. one-way

B. two-way

C. three-way

D. four-way

Answer: C

Question No: 15

Which two statements about configuring Frame Relay point-to-multipoint connections are true? (Choose two)

A. They ignore the broadcast keyword in the frame-relay DLCI mapping.

B. They require the same DLCI on each side of the link.

C. Changing a point-to-multipoint subinterface to a different type requires the interface to be deleted and recreated.

D. They require the frame-relay mapping command to be configured.

E. They require inverse ARP.

Answer: D,E

Question No: 16

Which option to the command service timestamps debug enables the logging server to capture the greatest amount of information from the router?

A. uptime

B. show-timezone

C. year

D. msec

Answer: D

Question No: 17

A Network engineer wants to configure logging to compile and send information to an external server. Which type of logging must be configured?

A. Terminal

B. Syslog

C. Buffer

D. Console

Answer: B

Question No: 18

Refer to the exhibit.

Which technology can be employed to automatically detect a WAN primary link failure and failover to the secondary link?

A. HSRP

B. VRRP

C. IP SLA

D. multicast

Answer: C

Question No: 19

Which two BGP neighbor states are valid? (Choose Two)

A. established

B. active

C. stuck in active

D. 2-WAY

E. unknown

F. DROTHER

Answer: A,B