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IP Services
This area measures a student's ability to perform the following:
- Configuring as well as verifying DHCP client & relay;
- Explaining the role of DNS and DHCP within the network;
- Deploying NTP operating in both a client and server mode;
- Configuring and verifying inside source NAT using static and pools 2019 Cisco Systems Inc.;
- Explaining the role of SNMP as part of network operations;
NEW QUESTION 114
Refer to the exhibit.
A packet is being sent across router R1 to host 172.163.3.14. To which destination does the router send the packet?
- A. 207.165.200.246 via Serial0/1/0
- B. 207.165.200.254 via Serial0/0/0
- C. 207.165.200.250 via Serial/0/0/0
- D. 207.165.200.254 via Serial0/0/1
Answer: D
NEW QUESTION 115
Refer to the exhibit.
Which command provides this output?
- A. show ip route
- B. show interface
- C. show cdp neighbor
- D. show ip interface
Answer: C
NEW QUESTION 116
which two facts must you table into account when you deploy PPPoE? (choose two)
- A. You must manually configure IP addresses on the PPPoE interface
- B. DDR is not supported
- C. An individual PVC can support one PPPoE client
- D. PPPoE supports a maximum of 10 clients per customer premises equipment
- E. DDR idle timers must be configured to support VPDN logging
Answer: D,E
NEW QUESTION 117
GRE Tunnel
Refer to the topology below and answer the following questions.
Why is the Branch2 network 10.1 0.20.0/24 unable to communicate with the Server farm1 network 10.10.10.0/24 over the GRE tunnel?
- A. The static route points to the tunnel0 interface that is misconfigured on the Branch2 router.
- B. The static route points to the tunnel0 interface that is misconfigured on the R2 router.
- C. The GRE tunnel destination is not configured on the Branch2 router.
- D. The GRE tunnel destination is not configured on the R2 router.
Answer: A
NEW QUESTION 118
Which design element is a best practice when deploying an 802.11b wireless infrastructure?
- A. setting the maximum data rate to 54 Mbps on the Cisco Wireless LAN Controller
- B. disabling TPC so that access points can negotiate signal levels with their attached wireless devices.
- C. allocating nonoverlapping channels to access points that are in close physical proximity to one another
- D. configuring access points to provide clients with a maximum of 5 Mbps
Answer: C
NEW QUESTION 119
DRAG DROP
Drag and drop the threat-mitigation techniques from the left onto the types of threat or attack they mitigate on the right.
Select and Place:
Answer:
Explanation:
Section: Security Fundamentals
Explanation:
Double-Tagging attack:
In this attack, the attacking computer generates frames with two 802.1Q tags. The first tag matches the native VLAN of the trunk port (VLAN 10 in this case), and the second matches the VLAN of a host it wants to attack (VLAN 20).
When the packet from the attacker reaches Switch A, Switch A only sees the first VLAN 10 and it matches with its native VLAN 10 so this VLAN tag is removed. Switch A forwards the frame out all links with the same native VLAN 10. Switch B receives the frame with an tag of VLAN 20 so it removes this tag and forwards out to the Victim computer.
Note: This attack only works if the trunk (between two switches) has the same native VLAN as the attacker.
To mitigate this type of attack, you can use VLAN access control lists (VACLs, which applies to all traffic within a VLAN. We can use VACL to drop attacker traffic to specific victims/servers) or implement Private VLANs.
ARP attack (like ARP poisoning/spoofing) is a type of attack in which a malicious actor sends falsified ARP messages over a local area network as ARP allows a gratuitous reply from a host even if an ARP request was not received. This results in the linking of an attacker's MAC address with the IP address of a legitimate computer or server on the network. This is an attack based on ARP which is at Layer 2. Dynamic ARP inspection (DAI) is a security feature that validates ARP packets in a network which can be used to mitigate this type of attack.
NEW QUESTION 120
Drag and drop the IPv4 network subnets from the left onto the correct usable host ranges on the right
Answer:
Explanation:
NEW QUESTION 121
Drag and drop the TCP or UDP details from the left onto their corresponding protocols on the right.
Answer:
Explanation:
NEW QUESTION 122
Refer to the exhibit.
An administrator must configure interfaces Gi1/1 and Gi1/3 on switch SW11 PC-1 and PC-2 must be placed in the Data VLAN and Phone-1 must be placed in the Voice VLAN Which configuration meets these requirements?
- A. Option A
- B. Option B
- C. Option D
- D. Option C
Answer: D
NEW QUESTION 123
Refer to the exhibit.
An engineer is tasked with verifying network configuration parameters on a client workstation to report back to the team lead. Drag and drop the node identifiers from the left onto the network parameters on the right.
Answer:
Explanation:
NEW QUESTION 124
Drag the IPv6 DNS record types from the left onto the description on the right.
Answer:
Explanation:
NEW QUESTION 125
Which two options are fields in an Ethernet frame? (choose two)
- A. source IP address
- B. header
- C. frame check sequence
- D. type
- E. destination IP address
Answer: C,D
NEW QUESTION 126
Refer to the exhibit.
Which route does R1 select for traffic that is destined to 192 168.16.2?
- A. 192.168.16.0/27
- B. 192.168 26.0/26
- C. 192.168.16.0/24
- D. 192.168.16.0/21
Answer: B
NEW QUESTION 127
The traffic from Branch to the main office is using the secondary path instead of the primary path connected to R2.
Which cause of the issue is true?
- A. The network 192.168. 11. 0/30 was not advertised into EIGRP on Branch2
- B. The IP address was misconfigured between the Branch2 and R2 interfaces
- C. The primary path has more link delay configured then secondary path which causes EIGRP to choose the secondary path.
- D. EIGRP packets were blocked by the inbound ACL on branch2
Answer: D
NEW QUESTION 128
A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented?
(Choose two)
- A. giants
- B. CRC
- C. frame
- D. input errors
- E. runts
Answer: B,D
Explanation:
Explanation
Whenever the physical transmission has problems, the receiving device might receive a frame whose bits have changed values. These frames do not pass the error detection logic as implemented in the FCS field in the Ethernet trailer. The receiving device discards the frame and counts it as some kind of input error.
Cisco switches list this error as a CRC error. Cyclic redundancy check (CRC) is a term related to how the FCS math detects an error.
The "input errors" includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts.
The output below show the interface counters with the "show interface s0/0/0" command:
NEW QUESTION 129
Refer to the exhibit.
What action establishes the OSPF neighbor relationship without forming an adjacency?
- A. modify network type
- B. modify process ID
- C. modify hello interval
- D. modify priority
Answer: C
NEW QUESTION 130
What are two benefits of using VTP in a switching environment? (Choose two.)
- A. It allows ports to be assigned to VLANs automatically.
- B. It allows frames from multiple VLANs to use a single interface.
- C. It allows VLAN information to be automatically propagated throughout the switching environment.
- D. It allows switches to read frame tags.
- E. It maintains VLAN consistency across a switched network.
Answer: C,E
NEW QUESTION 131
An engineer must configure a WLAN using the strongest encryption type for WPA2-PSK. Which cipher fulfills the configuration requirement?
- A. AES
- B. RC4
- C. WEP
- D. TKIP
Answer: A
Explanation:
Section: Security Fundamentals
Explanation:
Many routers provide WPA2-PSK (TKIP), WPA2-PSK (AES), and WPA2-PSK (TKIP/AES) as options. TKIP is actually an older encryption protocol introduced with WPA to replace the very-insecure WEP encryption at the time. TKIP is actually quite similar to WEP encryption. TKIP is no longer considered secure, and is now deprecated. In other words, you shouldn't be using it.
AES is a more secure encryption protocol introduced with WPA2 and it is currently the strongest encryption type for WPA2-PSK/.
NEW QUESTION 132
......
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