Practise Final Exam Flashcards
What routing table entry has a next hop address associated with a destination network?
- *A.** C and L source routes
- *B.** directly-connected routes
- *C.** local routes
- *D.** remote routes
D. remote routes
Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?
- *A.** protocol
- *B.** TTL
- *C.** header checksum
- *D.** destination IPv4 address
D. destination IPv4 address
Why is NAT not needed in IPv6?
- *A.** The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet.
- *B.** The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.
- *C.** Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.
- *D.** Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.
D. Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.
If the default gateway is configured incorrectly on the host, what is the impact on communications?
- *A.** The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
- *B.** The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
- *C.** There is no impact on communications.
- *D.** The host is unable to communicate on the local network.
B. The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
Which two commands could be used to check if DNS name resolution is working properly on a Windows PC? (Choose two.)
A. nslookup cisco.com
B. ipconfig /flushdns
C. net cisco.com
D. nbtstat cisco.com
E. ping cisco.com
- *A.** nslookup cisco.com
- *E.** ping cisco.com
Only employees connected to IPv6 interfaces are having difficulty connecting to remote networks. The analyst wants to verify that IPv6 routing has been enabled. What is the best command to use to accomplish the task?
- *A.** show running-config
- *B.** copy running-config startup-config
- *C.** show interfaces
- *D.** show ip nat translations
A. show running-config
A small advertising company has a web server that provides critical business service. The company connects to the Internet through a leased line service to an ISP. Which approach best provides cost effective redundancy for the Internet connection?
- *A.** Add a connection to the Internet via a DSL line to another ISP.
- *B.** Add another web server to prepare failover support.
- *C.** Add multiple connections between the switches and the edge router.
- *D.** Add a second NIC to the web server.
A. Add a connection to the Internet via a DSL line to another ISP.
Two students are working on a network design project. One student is doing the drawing, while the other student is writing the proposal. The drawing is finished and the student wants to share the folder that contains the drawing so that the other student can access the file and copy it to a USB drive. Which networking model is being used?
- *A.** point-to-point
- *B.** client-based
- *C.** peer-to-peer
- *D.** master-slave
C. peer-to-peer
Which command is used to manually query a DNS server to resolve a specific host name?
- *A.** ipconfig /displaydns
- *B.** net
- *C.** tracert
- *D.** nslookup
C. tracert
What service is provided by POP3?
- *A.** Allows remote access to network devices and servers.
- *B.** Uses encryption to provide secure remote access to network devices and servers.
- *C.** Retrieves email from the server by downloading the email to the local mail application of the client.
- *D.** An application that allows real-time chatting among remote users.
C. Retrieves email from the server by downloading the email to the local mail application of the client.
Refer to the exhibit. What does the value of the window size specify?
A. the amount of data that can be sent before an acknowledgment is required.
B. the total number of bits received during this TCP session.
C. a random number that is used in establishing a connection with the 3-way handshake.
C. the amount of data that can be sent at one time.
A. the amount of data that can be sent before an acknowledgment is required.
To which TCP port group does the port 414 belong?
A. well-known
B. public
C. private or dynamic
D. registered
A. well-known
A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?
A. DHCP
B. TFTP
C. DNS
D. SSH
D. SSH
Floor(config)# interface gi0/1
Floor(config-if)# description Connects to the Registrar LAN
Floor(config-if)# ip address 192.168.235.234 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface gi0/0
Floor(config-if)# description Connects to the Manager LAN
Floor(config-if)# ip address 192.168.234.114 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface s0/0/0
Floor(config-if)# description Connects to the ISP
Floor(config-if)# ip address 10.234.235.254 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface s0/0/1
Floor(config-if)# description Connects to the Head Office WAN
Floor(config-if)# ip address 203.0.113.3 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# end
Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?
A. 192.168.235.1
B. 203.0.113.3
C. 192.168.234.114
D. 10.234.235.254
E. 192.168.235.234
E. 192.168.235.234
A router boots and enters setup mode. What is the reason for this?
A. The IOS image is corrupt.
B. The configuration file is missing from NVRAM.
C. The POST process has detected hardware failure.
D. Cisco IOS is missing from flash memory.
B. The configuration file is missing from NVRAM
Match the command with the device mode at which the command is entered. (Not all options are used.)
1. login
2. service password-encryption
3. ip address 192.168.4.4 255.255.255.0
4. copy running-config startup-config
5. enable
A. R1(config)#
B. R1>
C. R1(config-router)#
D. R1#
E. R1(config-line)#
F. R1(config-if)#
1. — A.
2. — E.
3. — F.
4. — D.
5. — B.
What type of address is 198.133.219.162?
A. multicast
B. loopback
C. link-local
D. public
D. public
Given network 172.18.109.0, which subnet mask would be used if 6 host bits were available?
A. 255.255.224.0
B. 255.255.255.192
C. 255.255.255.248
D. 255.255.255.252
E. 255.255.192.0
B. 255.255.255.192
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?
A. Enter CTRL-Z at the privileged mode prompt.
B. Power cycle the device.
C. Exit privileged EXEC mode and press Enter.
D. Exit global configuration mode.
E. Reboot the device
C. Exit privileged EXEC mode and press Enter
Review: While at the privileged mode prompt such as Router#, type exit ,press Enter , and the banner message appears. Power cycling a network device that has had the banner motd command issued will also display the banner message, but this is not a quick way to test the configuration.
What happens when the transport input ssh command is entered on the switch vty lines?
A. The switch requires a username/password combination for remote access.
B. The SSH client on the switch is enabled.
C. Communication between the switch and remote users is encrypted.
D. The switch requires remote connections via a proprietary client software.
C. Communication between the switch and remote users is encrypted.
Review: The transport input ssh command when entered on the switch vty (virtual terminal lines) will encrypt all inbound controlled telnet connections.
What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
A. 2001:DA48::/64
B. 2001::/64
C. 2001:DA48:FC5:A4::/64
D. 2001:DA48:FC5::A4:/64
C. 2001:DA48:FC5:A4::/64
Review: The /64 represents the network and subnet IPv6 fields. The fourth field of hexadecimal digits is referred to as the subnet ID. The subnet ID for this address is 2001:DA48:FC5:A4::0/64.
A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?
A. It must send an ICMPv6 Router Solicitation message to determine what default gateway it should use.
B. It must send a DHCPv6 INFORMATION-REQUEST message to request the address of the DNS server.
C. It must send a DHCPv6 REQUEST message to the DHCPv6 server to request permission to use this address.
D. It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
D. It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
Review: Stateless DHCPv6 or stateful DHCPv6 uses a DHCP server, but Stateless Address Autoconfiguration (SLAAC) does not. A SLAAC client can automatically generate an address that is based on information from local routers via Router Advertisement (RA) messages. Once an address has been assigned to an interface via SLAAC, the client must ensure via Duplicate Address Detection (DAD) that the address is not already in use. It does this by sending out an ICMPv6 Neighbor Solicitation message and listening for a response. If a response is received, then it means that another device is already using this address.
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
A. FE80::/10
B. FDEE::/7
C. FF00::/8
D. FEC0::/10
A. FE80::/10
Review: 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 mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?
A. It checks the value of the TTL field and if it is 100, it discards the packet and sends a Destination Unreachable message to the source host.
B. It increments the value of the TTL field by 1 and if the result is 100, it discards the packet and sends a Parameter Problem message to the source host.
C. It checks the value of the TTL field and if it is 0, it discards the packet and sends a Destination Unreachable message to the source host.
D. It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
D. It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
