. What characteristic completes the following statement?When an IPv6 static route is configured, it is first necessary to configure ......
A) an administrative distance of 2.
B) the next-hop address of two different adjacent routers
C)  a directly connected multiaccess network. 
D) the "ipv6 unicast-routing" command
ANSWER: D
A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem?
A) The computer has an invalid IP address
B) The computer has an invalid default gateway address
C) The cable is not connected properly to the NIC.
D) The computer has an incorrect subnet mask
ANSWER: B
A host is transmitting a multicast. Which host or hosts will receive it?
A) all hosts on the Internet
B) a specially defined group of hosts
C) one specific host
D) directly connected network devices
ANSWER: B
A network administrator configures the interface fa0/0 on the router R1 with the command _IP ADDRESS 172.16.1.254 255.255.255.0._ However, when the administrator issues the command _SHOW IP ROUTE_, the routing table does not show the directly connected network. What is the possible cause of the problem?
A) The interface fa0/0 has not been activated.
B) The subnet mask is incorrect for the ipv4 address.
C) The configuration needs to be saved first.
D) No packets with a destination network of 172.16.1.0 have been sent to R1.
ANSWER: A
A teacher is having difficulties connecting his PC to the classroom network. He needs to verify that a default gateway is configured correctly. What is the best command to use to accomplish the task?
A) show interfaces
B) show ip nat translations
C) ipconfig
D) copy running-config startup-config
ANSWER: C
An administrator decides to use "12345678!" as the password on a newly installed router. Which statement applies to the password choice?
A) It is strong because it uses a minimum of 10 numbers, letters and special characters.
B) It is weak because it uses a series of numbers or letters.
C) It is strong because it uses a passphrase
D) It is weak since it is a word that is easily found in the dictionary.
ANSWER: B
An administrator issues the IPV6 ROUTE 2001:DB8:ACAD:1::/32 GIGABITETHERNET0/0 2001:DB8:ACAD:6::1 100 command on a router. What administrative distance is assigned to this route?
A) 100
B) 0
C) 32
D) 1
ANSWER: A
An employee at a branch office is creating a quote for a customer. In order to do this, the employee needs to access confidential pricing information from internal servers at the Head Office. What type of network would the employee access?
A) a local area network
B) an intranet
C) an extranet
D) the Internet
ANSWER: B
Consider the following command: IP ROUTE 192.168.10.0 255.255.255.0 10.10.10.2  5 What does the 5 at the end of the command signify?
A) metric
B) exit interface
C) maximum number of hops to the 192.168.10.0/24 network
D) administrative distance
ANSWER: D
Consider the following command: _ip route 192.168.10.0 255.255.255.0 10.10.10.2 5_ Which route would have to go down in order for this static route to appear in the routing table?
A) a default route
B) a static route to the 192.168.10.0/24 network
C) an OSPF-learned route to the 192.168.10.0/24 network
D) an EIGRP-learned route to the 192.168.10.0/24 network
ANSWER: B
The global configuration command _IP DEFAULT-GATEWAY 172.16.100.1_ is applied to a switch. What is the effect of this command?
A) The switch can be remotely managed from a host on another network
B) The switch can communicate with other hosts on the 172.16.100.0 network
C) The switch is limited to sending and receiving frames to and from the gateway 172.16.100.1.
D) The switch will have a management interface with the address 172.16.100.1.
ANSWER: A
What command is used to verify the condition of the switch interfaces, including the status of the interfaces and a configured IP address?
A) show ip interface brief
B) traceroute
C) ipconfig
D) ping
ANSWER: A
What does the term "attenuation" mean in data communication?
A) time for a signal to reach its destination
B) leakage of signals from one cable pair to another
C) strengthening of a signal by a networking device
D) loss of signal strength as distance increases
ANSWER: D
What happens when the _TRANSPORT INPUT SSH_ command is entered on the switch VTY LINES?
A) The SSH client on the switch is enabled.
B) The switch requires a username/password combination for remote access
C) Communication between the switch and remote users is encrypted.
D) The switch requires remote connections via a proprietary client software.
ANSWER: C
What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
A) Destination and source port numbers
B) Destination and source logical network addresses
C) Destination and source physical addresses
D) Timing and synchronization
ANSWER: A
What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward?
A) destination MAC address
B) source MAC address
C) source IP address
D) destination IP address
ANSWER: A
What information does the loopback test provide?
A) The TCP/IP stack on the device is working correctly
B) DHCP is working correctly
C) The Ethernet cable is working correctly
D) The device has end-to-end connectivity.
ANSWER: A
What is a characteristic of an IPv4 loopback interface on a Cisco IOS router?​
A) Only one loopback interface can be enabled on a router.​
B) It is a logical interface internal to the router
C) It is assigned to a physical port and can be connected to other devices. 
D) The no shutdown command is required to place this interface in an UP state. 
ANSWER: B
What is an accurate description of redundancy?
A) designing a network to use multiple virtual devices to ensure that all traffic uses the best path through the internetwork
B) configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination
C) configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered
D) designing a network to use multiple paths between switches to ensure there is no single point of failure
ANSWER: D
What is the advantage of using SSH over Telnet?
A) SSH provides secure communications to access hosts
B) SSH supports authentication for a connection request
C) SSH operates faster than Telnet
D) SSH is easier to use
ANSWER: A
What is the difference between a virus and a worm?
A) Viruses self-replicate but worms do not
B) Worms require a host file but viruses do not
C) Viruses hide in legitimate programs but worms do not.
D) Worms self-replicate but viruses do not
ANSWER: D
What is the effect of using the _ROUTER# COPY RUNNING-CONFIG STARTUP-CONFIG_ command on a router?
A) The contents of NVRAM will change
B) The contents of flash will change
C) The contents of RAM will change
D) The contents of ROM will change
ANSWER: A
What is the function of the HTTP GET message?
A) to send error information from a web server to a web client
B) to request an HTML page from a web server
C) to retrieve client email from an email server using TCP port 110
D) to upload content to a web server from a web client
ANSWER: B
What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64? 
A) A.      2001:DB8:BC15:A:1
B) 2001:DB8:BC15
C) 2001:DB8:BC15:A
D) 2001:DB8:BC15:A:12
ANSWER: C
What is the prefix length notation for the subnet mask 255.255.255.224?
A) /25
B) /26
C) /28
D) /27
ANSWER: D
What is the purpose of the network security authentication function?
A) to require users to prove who they are
B) to keep track of the actions of a user
C) to provide challenge and response questions
D) to determine which resources a user can access
ANSWER: A
What is the purpose of the subnet mask in conjunction with an IP address?
A) to determine the subnet to which the host belongs
B) to mask the IP address to outsiders
C) to uniquely identify a host on a network
D) to identify whether the address is public or private
ANSWER: A
What is the usable number of host IP addresses on a network that has a /26 mask?
A) 256
B) 32
C) 62
D) 254
ANSWER: C
What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly?
A) encapsulation
B) flow control
C) response timeout
D) access method
ANSWER: B
What routing table entry has a next hop address associated with a destination network?
A) Remote routes
B) C and L source routes
C) Local routes
D) Directly-connected routes
ANSWER: A
When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?
A) source IP address
B) destination MAC address
C) destination IP address
D) source MAC address
ANSWER: C
When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?
A) Subnet mask
B) DNS server address
C) DHCP server address
D) Default gateway
ANSWER: A
Which address is a valid IPv6 link-local unicast address?
A) FE80::1:4545:6578:ABC1
B) FEC8:1::FFFF
C) FD80::1:1234
D) FC90:5678:4251:FFFF
ANSWER: A
Which applications or services allow hosts to act as client and server at the same time?
A) client/server applications
B) P2P applications
C) authentication services
D) email applications
ANSWER: B
Which command can an administrator execute to determine what interface a router will use to reach remote networks?
A) show interfaces
B) show arp
C) show ip route
D) show protocols
ANSWER: C
Which is the compressed format of the IPv6 address fe80:09ea:0000:2200:0000:0000:0fe0:0290?
A) fe80::0220:0b3f:f0e0:0029
B) fe80:9ea0::2020:0:bf:e0:9290
C) fe80:9ea:0:2200::fe0:290
D) fe80::220:b3f:f0e0:29
ANSWER: C
Which network service automatically assigns IP addresses to devices on the network?
A) Traceroute
B) Telnet
C) DNS
D) DHCP
ANSWER: D
Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?
A) Peer-to-peer
B) Point-to-point
C) Client/server
D) Master-slave__
ANSWER: C
Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?
A) DNS
B) SMTP
C) HTTP
D) FTP
ANSWER: A
Which protocol should be used to mitigate the vulnerability of using Telnet to remotely manage network devices?
A) SCP
B) SNMP
C) SSH
D) TFTP
ANSWER: C
Which statement is correct about network protocols?
A) Network protocols define the type of hardware that is used and how it is mounted in racks.
B) They are only required for exchange of messages between devices on remote networks
C) They define how messages are exchanged between the source and the destination
D) They all function in the network access layer of TCP/IP.
ANSWER: C
Which subnet would include the address 192.168.1.96 as a usable host address?
A) 192.168.1.64/29
B) 192.168.1.64/26
C) 192.168.1.32/27
D) 192.168.1.32/28
ANSWER: B
Why does HTTP use TCP as the transport layer protocol?
A) because HTTP requires reliable delivery
B) to ensure the fastest possible download speed
C) because transmission errors can be tolerated easily
D) because HTTP is a best-effort protocol
ANSWER: A
Why would a network administrator use the tracert utility?
A) to determine the active TCP connections on a PC
B) to check information about a DNS name in the DNS server
C) to identify where a packet was lost or delayed on a network
ANSWER: C