CISCO Networking Test 2 Questions
with Correct Answers
Benefits of VPNs- Scalability - Answer-Scalability- More users can easily be added to
the network.
Benefits of VPNs- Cost Savings - Answer-Remote-connection bandwidth can be
increased, while also decreasing expensive WAN links and modem banks.
Benefits of VPNs- Security - Answer-Advanced encryption and authentication protocols
are used for data protection and access.
How does a host determine the value of its MSS field? - Answer-MSS (TCP Maximum
Segment Size) is determined by subtracting the IPv4 header and the TCP header from
the MTU (1500 bytes).
PPPoE supports an MTU of _____________________________. - Answer-only
supports an MTU of 1492 bytes in order to accommodate the additional 8-byte PPPoE
header.
Where can you verify the PPPoE MTU size? - Answer-in running-config type command:
show running-config | section interface Dialer2
R1(config-if)# ip tcp adjust-mss 1452 - Answer-command that helps prevent TCP
sessions from being dropped by adjusting the MSS value during the TCP 3-way
handshake.
VPN - Answer-A communications environment in which access is strictly controlled to
permit peer connections within a defined community of interest.
site-to-site VPN - Answer-An extension of a classic WAN network. Connect entire
networks to each other. They can connect a branch office network to a company
headquarters network. In the past, a leased line or Frame Relay connection was
required.
Remote-Access VPNs - Answer-Supports the needs of telecommuters, mobile users,
and extranet, consumer-to-business traffic.
Remote-Access VPNs - how they are created - Answer-Instead of being statically setup,
(site-to-site), but allows for dynamically changing information, and can be enabled and
disabled. Supports client/server architecture, where the VPN client (remote host) gains
secure access to the enterprise network via a VPN server device at the network edge.
, DMVPNs connect __________________ with ________________________ - Answer-
central office sites with branch sites.
DMVPN is built using what technologies? - Answer-Next Hop Resolution Protocol
(NHRP)
Multipoint Generic Routing Encapsulation (mGRE) tunnels
IP Security (IPsec) encryption
Remote Access - Answer-Dynamic VPN configuration for connecting to the network
Remote Access - Answer-Supported by a VPN server for client entry at the network
edge.
Site-to-Site - Answer-Static VPN configuration used for connecting to the network
VPN type used for most teleworkers, mobile users, and consumer-to-business network
traffic - Answer-Remote Access
Site-to-Site - Answer-Connects branch networks together.
GRE - Answer-basic, non-secure, site-to-site VPN tunneling protocol
Command used to determine whether the GRE tunnel is up or down: - Answer-show ip
interface brief | include tunnel
Command to verify the state of a GRE tunnel - Answer-show interface tunnel
Command to verify that an OSPF adjacency has been established over the tunnel
interface - Answer-show ip ospf neighbor
Why is GRE considered a VPN? - Answer-because it is a private network that is created
by tunneling over a public network.
Advantages of GRE - Answer-can be used to tunnel non-IP traffic over an IP network
supports IP multicast tunneling
can create IPv6 over IPv4 GRE tunnels, where IPv6 is the encapsulated protocol and
IPv4 is the transport protocol.
GRE issues are usually caused by - Answer-tunnel interface IP addresses not on the
same network or subnet masks do not match
interfaces for tunnel source and/or destination are not configured with the correct IP
addresses or are in the down state
static or dynamic routing is not properly configured.
multi-homed - Answer-When an AS has connections to multiple autonomous systems or
BGP peers.
with Correct Answers
Benefits of VPNs- Scalability - Answer-Scalability- More users can easily be added to
the network.
Benefits of VPNs- Cost Savings - Answer-Remote-connection bandwidth can be
increased, while also decreasing expensive WAN links and modem banks.
Benefits of VPNs- Security - Answer-Advanced encryption and authentication protocols
are used for data protection and access.
How does a host determine the value of its MSS field? - Answer-MSS (TCP Maximum
Segment Size) is determined by subtracting the IPv4 header and the TCP header from
the MTU (1500 bytes).
PPPoE supports an MTU of _____________________________. - Answer-only
supports an MTU of 1492 bytes in order to accommodate the additional 8-byte PPPoE
header.
Where can you verify the PPPoE MTU size? - Answer-in running-config type command:
show running-config | section interface Dialer2
R1(config-if)# ip tcp adjust-mss 1452 - Answer-command that helps prevent TCP
sessions from being dropped by adjusting the MSS value during the TCP 3-way
handshake.
VPN - Answer-A communications environment in which access is strictly controlled to
permit peer connections within a defined community of interest.
site-to-site VPN - Answer-An extension of a classic WAN network. Connect entire
networks to each other. They can connect a branch office network to a company
headquarters network. In the past, a leased line or Frame Relay connection was
required.
Remote-Access VPNs - Answer-Supports the needs of telecommuters, mobile users,
and extranet, consumer-to-business traffic.
Remote-Access VPNs - how they are created - Answer-Instead of being statically setup,
(site-to-site), but allows for dynamically changing information, and can be enabled and
disabled. Supports client/server architecture, where the VPN client (remote host) gains
secure access to the enterprise network via a VPN server device at the network edge.
, DMVPNs connect __________________ with ________________________ - Answer-
central office sites with branch sites.
DMVPN is built using what technologies? - Answer-Next Hop Resolution Protocol
(NHRP)
Multipoint Generic Routing Encapsulation (mGRE) tunnels
IP Security (IPsec) encryption
Remote Access - Answer-Dynamic VPN configuration for connecting to the network
Remote Access - Answer-Supported by a VPN server for client entry at the network
edge.
Site-to-Site - Answer-Static VPN configuration used for connecting to the network
VPN type used for most teleworkers, mobile users, and consumer-to-business network
traffic - Answer-Remote Access
Site-to-Site - Answer-Connects branch networks together.
GRE - Answer-basic, non-secure, site-to-site VPN tunneling protocol
Command used to determine whether the GRE tunnel is up or down: - Answer-show ip
interface brief | include tunnel
Command to verify the state of a GRE tunnel - Answer-show interface tunnel
Command to verify that an OSPF adjacency has been established over the tunnel
interface - Answer-show ip ospf neighbor
Why is GRE considered a VPN? - Answer-because it is a private network that is created
by tunneling over a public network.
Advantages of GRE - Answer-can be used to tunnel non-IP traffic over an IP network
supports IP multicast tunneling
can create IPv6 over IPv4 GRE tunnels, where IPv6 is the encapsulated protocol and
IPv4 is the transport protocol.
GRE issues are usually caused by - Answer-tunnel interface IP addresses not on the
same network or subnet masks do not match
interfaces for tunnel source and/or destination are not configured with the correct IP
addresses or are in the down state
static or dynamic routing is not properly configured.
multi-homed - Answer-When an AS has connections to multiple autonomous systems or
BGP peers.
