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2021 Aug ccna 100-101 book:

Q1. An administrator has connected devices to a switch and, for security reasons, wants the dynamically learned MAC addresses from the address table added to the running configuration. 

What must be done to accomplish this? 

A. Enable port security and use the keyword sticky. 

B. Set the switchport mode to trunk and save the running configuration. 

C. Use the switchport protected command to have the MAC addresses added to the configuration. 

D. Use the no switchport port-security command to allow MAC addresses to be added to the configuration. 

Answer: A 


Q2. Refer to the exhibit. 


Which two statements are correct? (Choose two.) 

A. This is a default route. 

B. Adding the subnet mask is optional for the ip route command. 

C. This will allow any host on the 172.16.1.0 network to reach all known destinations beyond RouterA. 

D. This command is incorrect, it needs to specify the interface, such as s0/0/0 rather than an IP address. 

E. The same command needs to be entered on RouterA so that hosts on the 172.16.1.0 network can reach network 10.0.0.0. 

Answer: AC 


Q3. Which of the following statements are TRUE regarding Cisco access lists? (Choose two.) 

A. In an inbound access list, packets are filtered as they enter an interface. 

B. In an inbound access list, packets are filtered before they exit an interface. 

C. Extended access lists are used to filter protocol-specific packets. 

D. You must specify a deny statement at the end of each access list to filter unwanted traffic. 

E. When a line is added to an existing access list, it is inserted at the beginning of the access list. 

Answer: AC 


Q4. Refer to the exhibit. 


Which default gateway address should be assigned to HostA? 

A. 192.168.1.1 

B. 192.168.1.65 

C. 192.168.1.66 

D. 192.168.1.129 

E. 10.1.1.1 

F. 10.1.1.2 

Answer: B 


Q5. Which network device functions only at Layer 1 of the OSI model? 


A. Option A 

B. Option B 

C. Option C 

D. Option D 

E. Option E 

Answer: B 


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Updated icnd1 pdf 100-101:

Q6. Refer to the exhibit. 


The junior network support staff provided the diagram as a recommended configuration for the first phase of a four-phase network expansion project. The entire network expansion will have over 1000 users on 14 network segments and has been allocated this IP address space. 

192.168.1.1 through 192.168.5.255 

192.168.100.1 through 192.168.100.255 

What are three problems with this design? (Choose three.) 

A. The AREA 1 IP address space is inadequate for the number of users. 

B. The AREA 3 IP address space is inadequate for the number of users. 

C. AREA 2 could use a mask of /25 to conserve IP address space. 

D. The network address space that is provided requires a single network-wide mask. 

E. The router-to-router connection is wasting address space. 

F. The broadcast domain in AREA 1 is too large for IP to function. 

Answer: ACE 


Q7. What is the default administrative distance of the OSPF routing protocol? 

A. 90 

B. 100 

C. 110 

D. 120 

E. 130 

F. 170 

Answer: C 


Q8. What is the default administrative distance of OSPF? 

A. 90 

B. 100 

C. 110 

D. 120 

Answer: C 


Q9. Why would a network administrator configure port security on a switch? 

A. to prevent unauthorized Telnet access to a switch port 

B. to prevent unauthorized hosts from accessing the LAN 

C. to limit the number of Layer 2 broadcasts on a particular switch port 

D. block unauthorized access to the switch management interfaces 

Answer: B 


Q10. Which of the following describe the process identifier that is used to run OSPF on a router? (Choose two) 

A. It is locally significant. 

B. It is globally significant. 

C. It is needed to identify a unique instance of an OSPF database. 

D. It is an optional parameter required only if multiple OSPF processes are running on the router. 

E. All routers in the same OSPF area must have the same process ID if they are to exchange routing information. 

Answer: AC