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Miscellaneous Questions
Question 1 Question 2 Explanation Cisco Express Forwarding (CEF) provides the ability to switch packets through a device in a very quick and efficient way while also keeping the load on the router’s...
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Wireless Questions
Question 1 Explanation Many Cisco access points offer single or double (dual) radio (2.4 and 5.0 GHz). Note: The wireless controller automates wireless configuration and management functions. It does...
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SDN Solution
Question 1 Explanation The Cisco Application Policy Infrastructure Controller (APIC) is the main architectural component of the Cisco ACI solution. It is the unified point of automation and management...
View ArticleNTP Questions
Question 1 Explanation Use the “ntp server” to form an association with a NTP server. Question 2 Explanation An Authoritative NTP Server can distribute time even when it is not synchronized to an...
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Question 1 Explanation The user-based access control implemented by SNMPv3 is based on contexts and user names, rather than on IP addresses and community strings. It is a partial implementation of the...
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Syslog Questions
Question 1 Explanation The “service timestamps log” command configures the system to apply a time stamp to logging messages. The time-stamp format for datetime is MMM DD HH:MM:SS, where MMM is the...
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DHCP Questions
Question 1 Explanation The command “show ip dhcp conflict” is used to display address conflicts found by a Cisco IOS DHCP Server when addresses are offered to the client. An example of the output of...
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Troubleshooting Questions
Question 1 Explanation At the end of each frame there is a Frame Check Sequence (FCS) field. FCS can be analyzed to determine if errors have occurred. FCS uses cyclic redundancy check (CRC) algorithm...
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Security Questions
Question 1 Question 2 Explanation The service password-encryption command will encrypt all current and future passwords so any password existed in the configuration will be encrypted. Question 3...
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IPv6 Questions 2
Question 1 Explanation IPv6 router advertisement message is one type of the ICMPv6 packets with Type field value of 134. It lists many facts, including the link-local IPv6 address of the router....
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IPv6 Questions
Question 1 Explanation In this case we use two rules: + Leading zeros in a field are optional+ Successive fields of 0 are represented as ::, but only once in an address If you are not sure about IPV6,...
View ArticleHSRP Questions
Question 1 Explanation First Hop Redundancy Protocol (FHRP) is a protocol that enables two or more devices to work together in a group, sharing a single IP address, the virtual IP address. One router...
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NAT/PAT Questions
Question 1 Question 2 Explanation By adding the keyword “overload” at the end of a NAT statement, NAT becomes PAT (Port Address Translation). This is also a kind of dynamic NAT that maps multiple...
View ArticleIP SLA Questions
Question 1 Question 2 Explanation The ICMP Echo operation measures end-to-end response time between a Cisco router and any devices using IP. Response time is computed by measuring the time taken...
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BGP Questions
Question 1 Explanation This command can be used to verify if a BGP connection to a BGP neighbor is good or not. Let’s see an example: Please pay attention to the “State/PfxRcd” column of the output....
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EIGRP Questions
Question 1 Explanation Below is an example of the “show ip eigrp neighbors” output. Let’s analyze these columns: + H: lists the neighbors in the order this router was learned + Address: the IP address...
View ArticleOSPF Questions
Question 1 Question 2 Question 3 Question 4 Explanation In order to become OSPF neighbor following values must be match on both routers: + Area ID + Authentication + Hello and Dead Intervals + Stub...
View ArticleRIP Questions
Question 1 Explanation “Enable RIP” is surely correct to configure RIPv2 but “enable auto-summary” is not recommended. Maybe there is another suitable option for this question (like “use ‘version 2’...
View ArticleSubnetting Questions
Question 1 Explanation Network A needs 120 hosts < 128 = 27 -> Need a subnet mask of 7 bit 0s -> “/25″. Because the ip subnet-zero command is used, network 172.16.3.0/30 can be used. Answer E...
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IP Routing
Question 1 Explanation When one route is advertised by more than one routing protocol, the router will choose to use the routing protocol which has lowest Administrative Distance. The Administrative...
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