9Tut Ccna 200 301
46 community-sourced questions and answers. Free — no login.
What is the difference between csu/dsu and a modem
Csu/dsu converts a digital signal from a router to a leased line; a modem converts digital signals from a router to a phone line
Describe the router bootup process
Post checks the routers hardware Configuration register will identify where to load the ios image After the ios image is stored the router loads the configuration file into ram
Where does routing occur within the dod tcp/ip reference model
Internet
Before installing a new ios, should you check the rom or ram
Ram, through the show version command
Which layer in the osi reference model is responsible for determining the availability if the receiving program and checking to see if enough resources exist for that communication
Application
How does service password encryption command on a router encrypt
By encrypting passwords in plain text configuration file
What is a global command
A command that can affect the entire router
What command would you use to allow only one telnet session an encrypt the password that would appear on a show command
Service password-encryption Line vty 1 Login Password
Which PPP sub protocol negotiations authentication options
Lcp
Which layer 2 protocol supports synchronous and asynchronous circuits and has built in security mechanisms
PPP
What are some examples of synchronous and asynchronous circuits
Synchronous would be analog (like analog phone lines) Asynchronous circuits like isdn or digital links
Describe characteristics of a csu/dsu and a modem
Csu/dsu terminates a digital local loop A modem terminates an analog loops
Is a router commonly considered a dte or dce device
Dte
When does chap authentication normally occur
After a link establishment
When a switch receives a frame with an unknown MAC destination, does it arp or flood
Flood
How do layer 2 Ethernet switches decrease the number of collisions on a network
Through micro segmentation
Why will a switch never learn from a broadcast address
Because it will never be the source address of a frame
What value is used to determine which port becomes the root port on each non root switch
Path cost
What three things are true about rstp
Rstp reduces topology the reconvergance after a link failure Rstp expands the stp port roles by adding the alternate and backup roles Rstp provides a faster transition to the forwarding state on point to point links than stp does
Which command enables rstp on a switch
Spanning-tree mode rapid-pvst
What acl would you use if you want to allow a temporary entry for a remote user with a specific username and password so that the user can access the entire network over the internet
Dynamic
How long does a static nat translation stay in the nat table
Until they are deleted
T or f: static nat. Translations allows connections to be initiated from the outside
True
What is the vlan range that can be removed from a switch
2-1001
How does a dhcp server handle ip dhcp conflicts
The address is removed from the pool until the conflict is resolved
If a dhcp conflict occurs, what must be done to resolve it
An admin must resolve the conflict
How does ospf allow for extensive control of routing
Admins can filter lsa's to meet their requirements
Why would an ospf entry be missing from a routing table
Wrong wild card mask
What command can you use to change the equal cost paths
Maximum-paths 2 command
What is the maximum number of equal cost paths that routers can have
6
True or false: with ospf, your hello and dead intervals should be the same
True
Which command is used to display the collection of ospf link states
Show ip ospf database
What protocol is an open standard protocol framework that is commonly used in VPN to provide secure end to end connections
IPSec
What are the three reasons that an organization might use cisco VPN solution instead of a point to point wan links
Reduces cost Increased security Scalability
For PPP authentication, what must match between 2 different but directly connected router
Passwords
Not setting a clock command will produce what type of code on the show ip interface brief command
Up down
What 3 things would cause a layer 2 problem between 2 connected routers
Keepalive mismatch Encapsulation mismatch Clocking problem
What are three characteristics of an ipv6 Anycast address
One to nearest communication model The same address for multiple devices in the group Delivery of packets to the group interface that is closest to the sending device
What 3 approaches can u use to migrate ipv4 to ipv6
Configuring ipv4 tunnels between ipv6 islands Use proxying and translation (nat-pt) to translate ipv6 packets into ipv4 packets Enable dual stacking
Which two ipv6 addresses can be used for unicast routing
Global addresses starting with 2000::/3 Loopback ::1
What is known as one to nearest addressing in ipv6
Anycast
What does chap help with
Verify the identity of the peer by means of a three way handshake
What will happen if you have two matching static routes
The more specific route (the one with the most 1's) will be chose to route a packet
What are the advantages and disadvantages of point to point links
Ad: quality Dis: limited flexibility
What are the advantages and disadVantages of a circuit switch
Adv: cost Dis: low speed
What is the advantage and disadvantage of packet switch
Ad: efficient Dis: more complex
Looking for a different version?
CBTs get updated every year. Search for the exact version you're taking (e.g. "cyber awareness 2025").
Search all study materials