Deck 1 Flashcards
means that out of all routes in a routing table, the router should choose the one that has the longest… and at the same time this… matches the… of the destination IP address.
prefix match
leaf switches connect endpoint devices, ….connect leaves
spines
what command creates an ipv6 address?
ipv6 address autoconfig
What IPV6 multicast groups are joined when config’ing an inteface with IPV6?
FF02::1 and FF02::2
What address range(s) can be used to communicate WITHOUT internet connectivity?
Private ranges
IPV6 multicast uses what address block? IPV6 link local (subnet) uses what?
FF00::/8, FE80::/10 (w/64 bit int identifier)
Define late collision? How do they occur?
-happens after first 512 bits/64 bytes of frame transmission
-duplex mismatch or cable too long
POE power classification override, what happens?
-port is shutdown and err-disabled because max admin value exceeded
frame flooding. What happens? How different from broadcast?
Frames are sent to all ports on switch in same vlan except ORIGINAL port
Difference is broadcast destination make is an FF address, whereas frame flooding destination is the ACTUAL MAC address
Auto configures IPV6 address on an int derived from a MAC. Doesn’t need DHCP
SLAAC
Features of FIBER?
-Glass core encased in cladding
-light goes thru core of fiber
How does CAPWAP communicate between access point in local mode and a WLC?
link thru switch, assuming connection to the WLC
link local, global unicast, and unique local are all UNICAST types
FF00::/12 is what kind of address?
2000::/3?
FC00::/7 and FD00::/8?
FE80::/10?
-IPV6 multicast
-global unicast
-unique local\
-link-local (similar to APIPA in IPV4)
IPV4 unicast address range?
0.0.0.0-223.255.255.255
…….: from one source to one destination i.e. One-to-One
……..: from one source to all possible destinations i.e. One-to-All
……: from one source to multiple destinations stating an interest in receiving the traffic i.e. One-to-Many
unicast, broadcast, multicast
Equivalent to IPV4 public addresses
IPV6 global unicast
320 ppl, one subnet, address range 192.168.0.0
What will subnet mask be?
/23 (use the power of 2. 2 to the 9th= 512. 512 is CLOSEST number to 320 that is also LARGER than 320)
Frames under 64 bytes are called
Also what is CRC?
runts.
CRC detects accidental data changes for integrity purposes
Imagine a router with the following routing table:
192.168.0.0/16 via Next_Hop_X
192.168.10.0/24 via Next_Hop_Y
192.168.10.64/26 via Next_Hop_Z
0.0.0.0/0 (default route) via Next_Hop_W
Now, if a packet comes in with the destination IP address 192.168.10.70, which next hop would the router choose based on its routing table?
192.168.10.64/26 via Next_Hop_Z
TCP uses checksums, retransmissions, and…
UDP uses checksums only
ACK
enabling this can move traffic from a congested 2.4 to a less congested 5
band select
refers to the ability of a network system, particularly wireless networks, to apply specific attributes dynamically to individual clients or users based on the results of the AAA (Authentication, Authorization, and Accounting) process.
AAA override
SMTP SSH FTP are TCP or UDP?
VOIP TFTP SNMP?
-TCP
-UDP
Two router interfaces cannot be in the…
same network
Break it down: ip route 172.16.3.0 255.255.255.0 192.168.2.4
-static route for 172.16.3.0 created
-192.168.x.x is NEXT HOP
-default admin distance is used because no other is specified. 1 by default. If you see number at end, it’s a admin distance being set. Lowest admin distance is preferable to others.
Private IPs less costly than public ones. True?
Yeah
Benefits of private IPs?
-conserve IPV4 addresses because ALL devices NAT’d on internet to appear as though from one IP
Best WAN technology for a SOHO?
Why is frame relay and PPP leased line not?
-broadband cable?
-frame relay is old
-leased line is expensive and better for large corporations
Best WAN architectures for a for scalability/redundancy
-Dual homed branches (home branch has two providers/connections)
-dynamic routing
Binary patterns for the following:
-unique local
-global unicast
-multicast
-link local
-11111110
-001
-11111111
-1111111010
SFP modules convert fiber to ethernet and vice versa. They are also…
hot swappable
Combine core and distribution layers. What is this called and what does it enforce?
-collapsed core
-security policies
In a three tier network, core layer does what two things?
-ensure uninterrupted forward service
-timely data transfer between layers
DTE receives clock signal. Who sets/sends clock signal?
DCE
Management Plane protocols?
telnet, ssh, snmp, syslog
