Module 1- 76-100 Flashcards
An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections? (Choose three.)
Configure the IP domain name on the router.
Generate the SSH keys.
Enable inbound vty SSH sessions.
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
-implements trailer with frame check sequence for error detection
-implements a process to delimit fields within an Ethernet 2 frame
-responsible for internal structure of Ethernet frame
-implements trailer with frame check sequence for error detection
-integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper
-implements CSMA/CD over legacy shared half-duplex media
-applies delimiting of Ethernet frame fields to synchronize communication between nodes
-implements trailer with frame check sequence for error detection
An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet?
all IPv6 configured routers on the local link
What are the three parts of an IPv6 global unicast address? (Choose three.)
-subnet ID
-global routing prefix
-interface ID
A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)
-interference
-security
-coverage area
Explanation: The three areas of concern for wireless networks focus on the size of the coverage area, any nearby interference, and providing network security. Extensive cabling is not a concern for wireless networks, as a wireless network will require minimal cabling for providing wireless access to hosts. Mobility options are not a component of the areas of concern for wireless networks.
A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?
Exit privileged EXEC mode and press Enter .
What method is used to manage contention-based access on a wireless network?
CSMA/CA
What is a function of the data link layer?
provides for the exchange of frames over a common local media
What is the purpose of the TCP sliding window?
to request that a source decrease the rate at which it transmits data
Explanation: The TCP sliding window allows a destination device to inform a source to slow down the rate of transmission. To do this, the destination device reduces the value contained in the window field of the segment. It is acknowledgment numbers that are used to specify retransmission from a specific point forward. It is sequence numbers that are used to ensure segments arrive in order. Finally, it is a FIN control bit that is used to end a communication session.
What characteristic describes spyware?
software that is installed on a user device and collects information about the user
Which switching method drops frames that fail the FCS check?
store-and-forward switching
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FE80::/10
Explain:
Link-local addresses are in the range of FE80::/10 to FEBF::/10. The original IPv6 specification defined site-local addresses and used the prefix range FEC0::/10, but these addresses were deprecated by the IETF in favor of unique local addresses. FDEE::/7 is a unique local address because it is in the range of FC00::/7 to FDFF::/7. IPv6 multicast addresses have the prefix FF00::/8.
What service is provided by FTP?
Allows for data transfers between a client and a file server.
A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)
-DNS server
-default gateway
Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)
-NAT introduces problems for some applications that require end-to-end connectivity.
-NAT provides a solution to slow down the IPv4 address depletion.
Explanation: Network Address Translation (NAT) is a technology that is implemented within IPv4 networks. One application of NAT is to use private IP addresses inside a network and use NAT to share a few public IP addresses for many internal hosts. In this way it provides a solution to slow down the IPv4 address depletion. However, since NAT hides the actual IP addresses that are used by end devices, it may cause problems for some applications that require end-to-end connectivity.
