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Exam Code: 300-101 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Implementing Cisco IP Routing
Certification Provider: Cisco
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2021 Jun hpc-300-101:
Q41. Refer to the following access list.
access-list 100 permit ip any any log
After applying the access list on a Cisco router, the network engineer notices that the router CPU utilization has risen to 99 percent. What is the reason for this?
A. A packet that matches access-list with the "log" keyword is Cisco Express Forwarding switched.
B. A packet that matches access-list with the "log" keyword is fast switched.
C. A packet that matches access-list with the "log" keyword is process switched.
D. A large amount of IP traffic is being permitted on the router.
Answer: C
Explanation:
Logging-enabled access control lists (ACLs) provide insight into traffic as it traverses the
network or is dropped by network devices. Unfortunately, ACL logging can be CPU intensive and can
negatively affect other functions of the network device. There are two primary factors that contribute to the
CPU load increase from ACL logging: process switching of packets that match log-enabled access control
entries (ACEs) and the generation and transmission of log messages. Reference: http://www.cisco.com/
web/about/security/intelligence/acl-logging.html#4
Q42. A network engineer initiates the ip sla responder tcp-connect command in order to gather statistics for performance gauging. Which type of statistics does the engineer see?
A. connectionless-oriented
B. service-oriented
C. connection-oriented
D. application-oriented
Answer: C
Explanation:
Configuration Examples for IP SLAs TCP Connect Operations The following example shows
how to configure a TCP Connection-oriented operation from Device B to the Telnet port (TCP port 23) of IP
Host 1 (IP address 10.0.0.1), as shown in the "TCP Connect Operation" figure in the "Information About
the IP SLAs TCP Connect Operation" section. The operation is scheduled to start immediately. In this
example, the control protocol is disabled on the source (Device B). IP SLAs uses the control protocol to
notify the IP SLAs responder to enable the target port temporarily. This action allows the responder to reply
to the TCP Connect operation. In this example, because the target is not a Cisco device and a well- known
TCP port is used, there is no need to send the control message. Device A (target device) Configuration
configure terminal ip sla responder tcp-connect ipaddress 10.0.0.1 port 23
Reference: http://
www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla-15- mt-book/ sla_tcp_conn.html
Q43. Refer to the exhibit. Which statement about the configuration is true?
A. 20 packets are being sent every 30 seconds.
B. The monitor starts at 12:05:00 a.m.
C. Jitter is being tested with TCP packets to port 65051.
D. The packets that are being sent use DSCP EF.
Answer: A
Explanation:
Q44. Which protocol uses dynamic address mapping to request the next-hop protocol address for a specific connection?
A. Frame Relay inverse ARP
B. static DLCI mapping
C. Frame Relay broadcast queue
D. dynamic DLCI mapping
Answer: A
Explanation:
Dynamic address mapping uses Frame Relay Inverse ARP to request the next-hop protocol address for a
specific connection, given its known DLCI. Responses to
Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server; the
table is then used to supply the next-hop protocol
address or the DLCI for outgoing traffic.
Reference:
http://www.cisco.com/c/en/us/td/docs/ios/12_2/wan/configuration/guide/fwan_c/wcffrely.html
Q45. Which two actions must you perform to enable and use window scaling on a router? (Choose two.)
A. Execute the command ip tcp window-size 65536.
B. Set window scaling to be used on the remote host.
C. Execute the command ip tcp queuemax.
D. Set TCP options to "enabled" on the remote host.
E. Execute the command ip tcp adjust-mss.
Answer: A,B
Explanation:
The TCP Window Scaling feature adds support for the Window Scaling option in RFC 1323,
TCP Extensions for High Performance . A larger window size is recommended to improve TCP performance in network paths with large bandwidth-delay product characteristics that are called Long Fat
Networks (LFNs).
The TCP Window Scaling enhancement provides that support. The window scaling extension in Cisco IOS software expands the definition of the TCP window to 32 bits and then uses a scale factor to carry this 32-bit value in the 16-bit window field of the TCP header.
The window size can increase to a scale factor of 14. Typical applications use a scale factor of 3 when deployed in LFNs.
The TCP Window Scaling feature complies with RFC 1323. The larger scalable window size will allow TCP to perform better over LFNs.
Use the ip tcp window-size command in global configuration mode to configure the TCP window size. In order for this to work, the remote host must also support this feature and its window size must be increased.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp/
configuration/12-4t/iap-12- 4t-book/iap-tcp.html#GUID-BD998AC6-F128-47DD-B5F7-B226546D4B08
Improve ccnp route exam dumps 300-101:
Q46. A network engineer is asked to configure a "site-to-site" IPsec VPN tunnel. One of the last things that the engineer does is to configure an access list (access-list 1 permit any) along with the command ip nat inside source list 1 int s0/0 overload. Which functions do the two commands serve in this scenario?
A. The command access-list 1 defines interesting traffic that is allowed through the tunnel.
B. The command ip nat inside source list 1 int s0/0 overload disables "many-to-one" access for all devices on a defined segment to share a single IP address upon exiting the external interface.
C. The command access-list 1 permit any defines only one machine that is allowed through the tunnel.
D. The command ip nat inside source list 1 int s0/0 overload provides "many-to-one" access for all devices on a defined segment to share a single IP address upon exiting the external interface.
Answer: D
Explanation:
Configuring NAT to Allow Internal Users to Access the Internet Using Overloading NAT Router
interface ethernet 0
ip address 10.10.10.1 255.255.255.0
ip nat inside
!--- Defines Ethernet 0 with an IP address and as a NAT inside interface.
interface ethernet 1
ip address 10.10.20.1 255.255.255.0
ip nat inside
!--- Defines Ethernet 1 with an IP address and as a NAT inside interface.
interface serial 0
ip address 172.16.10.64 255.255.255.0
ip nat outside
!--- Defines serial 0 with an IP address and as a NAT outside interface.
ip nat pool ovrld 172.16.10.1 172.16.10.1 prefix 24 !
!--- Defines a NAT pool named ovrld with a range of a single IP
!--- address, 172.16.10.1.
ip nat inside source list 7 pool ovrld overload
!
!
!
!
!--- Indicates that any packets received on the inside interface that
!--- are permitted by access-list 7 has the source
address
!--- translated to an address out of the NAT pool named ovrld.
!--- Translations are overloaded, which allows multiple inside
!--- devices to be translated to the same valid IP
address.
access-list 7 permit 10.10.10.0 0.0.0.31
access-list 7 permit 10.10.20.0 0.0.0.31
!--- Access-list 7 permits packets with source addresses ranging from
!--- 10.10.10.0 through 10.10.10.31 and 10.10.20.0
through 10.10.20.31.
Note in the previous second configuration, the NAT pool "ovrld"only has a range of one address. The
keyword overload used in the ip nat inside source list 7 pool
ovrld overload command allows NAT to translate multiple inside devices to the single address in the pool.
Reference:
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77.shtml
Q47. A company's corporate policy has been updated to require that stateless, 1-to-1, and IPv6 to IPv6 translations at the Internet edge are performed. What is the best solution to ensure compliance with this new policy?
A. NAT64
B. NAT44
C. NATv6
D. NPTv4
E. NPTv6
Answer: E
Explanation:
NPTv6 provides a mechanism to translate the private internal organization prefixes to public globally
reachable addresses. The translation mechanism is stateless and provides a 1:1 relationship between the internal addresses and external addresses. The use cases for NPTv6 outlined in the RFC include peering with partner networks, multi homing, and redundancy and load sharing.
Reference:
http://www.cisco.com/c/dam/en/us/td/docs/solutions/SBA/August2012/Cisco_SBA_BN_IPv6AddressingGuide-Aug2012.pdf
Q48. A network administrator uses IP SLA to measure UDP performance and notices that packets on one router have a higher one-way delay compared to the opposite direction. Which UDP characteristic does this scenario describe?
A. latency
B. starvation
C. connectionless communication
D. nonsequencing unordered packets
E. jitter
Answer: A
Explanation:
Cisco IOS IP SLAs provides a proactive notification feature with an SNMP trap. Each measurement
operation can monitor against a pre-set performance threshold.
Cisco IOS IP SLAs generates an SNMP trap to alert management applications if this threshold is crossed.
Several SNMP traps are available: round trip time, average jitter, one-way latency, jitter, packet loss, MOS, and connectivity tests.
Here is a partial sample output from the IP SLA statistics that can be seen:
router#show ip sla statistics 1
Round Trip Time (RTT) for Index 55
Latest RTT: 1 ms
Latest operation start time: *23:43:31.845 UTC Thu Feb 3 2005 Latest operation return code: OK
RTT Values:
Number Of RTT: 10 RTT Min/Avg/Max: 1/1/1 milliseconds Latency one-way time:
Number of Latency one-way Samples: 0
Source to Destination Latency one way Min/Avg/Max: 0/0/0 milliseconds Destination to Source Latency
one way Min/Avg/Max: 0/0/0 milliseconds
Reference:
http://www.cisco.com/en/US/technologies/tk648/tk362/tk920/technologies_white_paper09186a0
0802d5efe.html
Q49. A network engineer is trying to implement broadcast-based NTP in a network and executes the ntp broadcast client command. Assuming that an NTP server is already set up, what is the result of the command?
A. It enables receiving NTP broadcasts on the interface where the command was executed.
B. It enables receiving NTP broadcasts on all interfaces globally.
C. It enables a device to be an NTP peer to another device.
D. It enables a device to receive NTP broadcast and unicast packets.
Answer: A
Explanation:
The NTP service can be activated by entering any ntp command. When you use the ntp broadcast client
command, the NTP service is activated (if it has not already been activated) and the device is configured to receive NTP broadcast packets on a specified interface simultaneously.
Command Description
ntp broadcast Allows the system to receive NTP broadcast packets on an client interface.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-xe-3se-3850- cr-book/
bsm-xe-3se-3850-cr-book_chapter_00.html
Q50. Scenario:
You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command.
Which of the following statements is true about the serial links that terminate in R3
A. The R1-R3 link needs the neighbor command for the adjacency to stay up
B. The R2-R3 link OSPF timer values are 30, 120, 120
C. The R1-R3 link OSPF timer values should be 10,40,40
D. R3 is responsible for flooding LSUs to all the routers on the network.
Answer: B
Explanation: