TE1
NT2
S
T
NT1
U
S TE2
TA
R
US EU
Mask CIDR Net Host Rng 252 /30 6 2 4 248 /29 5 3 8 240 /28 4 4 16 224 /27 3 5 32 192 /26 2 6 64 128 /25 1 7 128 0 /24 0 8 0
Ports
Protocol
21 22 23 25 53 69 110 119 161
FTP SSH Telnet SMTP DNS TFTP POP3 NNTP SNMP
80: HTTP 443: HTTPS
TCP
TCP Both!
UDP
Protocol Type EIGRP Hybrid
Admin Dist 90
Metrics
Notes
Multiple 32-bit composite
IGRP
DistVector
100
Bandwidth, Delay
OSPF
Linkstate DistVector
110
Bandwidth
Classless, VLSM, DUAL, RTP, PDMs (1x table set per prot), multiple AS#s, mult L3 prots, summarization Cisco prop, 255 max-hop-ct (100 default), AS#, updates @90 sec, invalid @270 sec, hold-down 280 secs, flush 630 secs, classless, VLSM Dijkstra alg, classless (VLSM), wildcard mask
120
Hop count
RIPv1
7 6 5 4 3 2 1
OSI Layer Application Presentation Session Transport Network Data Link Physical
IP Classes A 1 – 126 B 128 – 191 C 192 – 223
PDU Data Data Data Segment Packet Frame Bits
classful, 30 sec updates,180 sec route invalid,240 sec route flush, max. 15 hops (Bellman-Ford alg), round-robin load balancing (max. 6 links)
Internet Layer 4 Application
Internet layer Protocols SNMP, Telnet, FTP, TFTP
3 Transport 2 Internetwork 1 Network Interface
TCP, UDP IP, OSPF, RIP, ICMP lower-layer protocol standards
Private IPs 10.0.0.0 – 10.255.255.255 172.16.0.0 – 172.31.255.255 192.168.0.0 – 192.168.255.255
Dialer map steps: 1. dialer 2. map 3.
4. 5. dial-string
Blocking Listening Learning Forwardin g
DDR dialing sequence: 1. route determination 2. ID interesting traffic 3. Dialer info lookup 4. Traffic txn 5. Call terminated/timed out Standard ACL: Cisco(config)#access-list <1-99>